Pharmaceutical compositions with enhanced permeation

PHARMACEUTICAL COMPOSITIONS WITH ENHANCED PERMEATION

CLAIM FOR PRIORITY

This application is a continuation-in-part of U.S. Patent Application No. 15/724,234 filed October 3, 2017 and a continuation-in-part of U.S. Patent Application No. 15/717,856, filed September 27, 2017, which is a continuation-in-part of U.S. Patent Application No. 15/587,376, filed May 4, 2017, which claims priority under 35 U.S.C. §119(e) to U.S. Patent Application Serial No. 62/331,993 filed on May 5, 2016, and which claims priority under 35 U.S.C. §119(e) to U.S. Patent Application Serial No. 62/735,822 filed on September 24, 2018, each of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

This invention relates to pharmaceutical compositions.

BACKGROUND

Active ingredients, such as drugs or pharmaceuticals, are delivered to patients in deliberate fashion. Delivery of drugs or pharmaceuticals using film transdermally or transmucosally can require that the drug or pharmaceutical permeate or otherwise cross a biological membrane in an effective and efficient manner.

SUMMARY

In general a pharmaceutical composition can include a polymeric matrix, a pharmaceutically active component in the polymeric matrix, and an adrenergic receptor interacter. In certain embodiments, the pharmaceutical composition can further include a permeation enhancer. An adrenergic receptor interacter can be an adrenergic receptor blocker. The permeation enhancer can also be a flavonoid, or used in combination with a flavonoid.

In certain embodiments, the adrenergic receptor interacter can be a terpenoid, terpene or a C3-C22 alcohol or acid. The adrenergic receptor interacter can be a sesquiterpene. In certain embodiments, the adrenergic receptor interacter can include farnesol, linoleic acid, arachidonic

acid, docosahexanoic acid, eicosapentanoic acid, or docosapentanoic acid, or combinations thereof.

In certain embodiments, a pharmaceutical composition can include a polymeric matrix, a pharmaceutically active component in the polymeric matrix, and an aporphine alkaloid interacter.

In other embodiments, a pharmaceutical composition can include a polymeric matrix, a pharmaceutically active component in the polymeric matrix, and a vasodilator interacter.

In certain embodiments, the pharmaceutical composition can be a film further comprising a polymeric matrix, the pharmaceutically active component being contained in the polymeric matrix.

In certain embodiments, the adrenergic receptor interacter can be a phytoextract.

In certain embodiments, the permeation enhancer can be a phytoextract.

In certain embodiments, the permeation enhancer can include a phenylpropanoid.

In other embodiments, the phenylpropanoid can be eugenol.

In certain embodiments, the pharmaceutical composition can include a fungal extract.

In certain embodiments, the pharmaceutical composition can include saturated or unsaturated alcohol.

In certain embodiments, the alcohol can be benzyl alcohol.

In some cases, the flavonoid, phytoextract, phenylpropanoid, eugenol, or fungal extract can be used as a solubilizer.

In other embodiments, the phenylpropanoid can be eugenol. In certain embodiments, the phenylpropanoid can be a eugenol acetate. In certain embodiments, the phenylpropanoid can be a cinnamic acid. In other embodiments, the phenylpropanoid can be a cinnamic acid ester. In other embodiments, phenylpropanoid can be a cinnamic aldehyde.

In other embodiments, the phenylpropanoid can be a hydrocinnamic acid. In certain embodiments, the phenylpropanoid can be chavicol. In other embodiments, the phenylpropanoid can be safrole.

In certain embodiments, the phytoextract can be an essential oil extract of a clove plant. In other examples, the phytoextract can be an essential oil extract of a leaf of a clove plant. The phytoextract can be an essential oil extract of a flower bud of a clove plant. In other embodiments, the phytoextract can be an essential oil extract of a stem of a clove plant.

In certain embodiments, the phytoextract can be synthetic. In certain embodiments, the phytoextract can include 20-95% eugenol, including 40-95% eugenol, and including 60-95% eugenol. In certain embodiments, the phytoextract can include 80-95% eugenol.

In other embodiments, the pharmaceutically active component can be epinephrine.

In certain embodiments, the pharmaceutically active component can be diazepam.

In certain embodiments, the pharmaceutically active component can be alprazolam.

In certain embodiments, the polymer matrix can include a polymer. In certain embodiments, the polymer can include a water soluble polymer.

In certain embodiments, the polymer can be a polyethylene oxide.

In certain embodiments, the polymer can be a cellulosic polymer. In certain embodiments, the cellulosic polymer can be hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropyl cellulose, methylcellulose, carboxymethyl cellulose and/or sodium carboxymethylcellulose.

In certain embodiments, the polymer can include hydroxypropyl methylcellulose.

In certain embodiments, the polymer can include polyethylene oxide and/or hydroxypropyl methylcellulose.

In certain embodiments, the polymer can include polyethylene oxide and/or polyvinyl pyrrolidone.

In certain embodiments, the polymeric matrix can include polyethylene oxide and/or a polysaccharide.

In certain embodiments, the polymeric matrix can include polyethylene oxide, hydroxypropyl methylcellulose and/or a polysaccharide.

In certain embodiments, the polymeric matrix can include polyethylene oxide, a cellulosic polymer, polysaccharide and/or polyvinylpyrrolidone.

In certain embodiments, the polymeric matrix can include at least one polymer selected from the group of: pullulan, polyvinyl pyrrolidone, polyvinyl alcohol, sodium alginate, polyethylene glycol, xanthan gum, tragancanth gum, guar gum, acacia gum, arabic gum, polyacrylic acid, methylmethacrylate copolymer, carboxyvinyl copolymers, starch, gelatin, ethylene oxide, propylene oxide co-polymers, collagen, albumin, poly-amino acids, polyphosphazenes, polysaccharides, chitin, chitosan, and derivatives thereof.

In certain embodiments, the pharmaceutical composition can further include a stabilizer.

Stabilizers can include antioxidants, which can prevent unwanted oxidation of materials, sequestrants, which can form chelate complexes and inactivating traces of metal ions that would otherwise act as catalysts, emulsifiers and surfactants, which can stabilize emulsions, ultraviolet stabilizers, which can protect materials from harmful effects of ultraviolet radiation, UV absorbers, chemicals absorbing ultraviolet radiation and preventing it from penetrating the composition, quenchers, which can dissipate the radiation energy as heat instead of letting it break chemical bonds, or scavengers which can eliminate free radicals formed by ultraviolet radiation.

In yet another aspect, the pharmaceutical composition has a suitable nontoxic, nonionic alkyl glycoside having a hydrophobic alkyl group joined by a linkage to a hydrophilic saccharide in combination with a mucosal delivery-enhancing agent selected from: (a) an aggregation inhibitory agent; (b) a charge-modifying agent; (c) a pH control agent; (d) a degradative enzyme inhibitory agent; (e) a mucolytic or mucus clearing agent; (f) a ciliostatic agent; (g) a membrane penetration-enhancing agent selected from: (i) a surfactant; (ii) a bile salt; (ii) a phospholipid additive, mixed micelle, liposome, or carrier; (iii) an alcohol; (iv) an enamine; (v) a nitric oxide donor compound; (vi) a long chain amphipathic molecule; (vii) a small hydrophobic penetration enhancer; (viii) sodium or a salicylic acid derivative; (ix) a glycerol ester of acetoacetic acid; (x) a cyclodextrin or beta-cyclodextrin derivative; (xi) a medium-chain fatty acid; (xii) a chelating agent; (xiii) an amino acid or salt thereof; (xiv) an N-acetylamino acid or salt thereof; (xv) an enzyme degradative to a selected membrane component; (ix) an inhibitor of fatty acid synthesis; (x) an inhibitor of cholesterol synthesis; and (xi) any combination of the membrane penetration enhancing agents recited in (i)-(x); (h) a modulatory agent of epithelial junction physiology; (i) a vasodilator agent; (j) a selective transport-enhancing agent; and (k) a stabilizing delivery vehicle, carrier, mucoadhesive, support or complex-forming species with which the compound is effectively combined, associated, contained, encapsulated or bound resulting in stabilization of the compound for enhanced mucosal delivery, wherein the formulation of the compound with the transmucosal delivery-enhancing agents provides for increased bioavailability of the compound in a blood plasma of a subject.

In general a method of making a pharmaceutical composition can include combining an adrenergic receptor interacter with a pharmaceutically active component and forming a

pharmaceutical composition including the adrenergic receptor interacter and the pharmaceutically active component.

The pharmaceutical composition can be a chewable or gelatin based dosage form, spray, gum, gel, cream, tablet, liquid or film.

In general, a pharmaceutical composition can be dispensed from a device. The device can dispense a pharmaceutical composition in a predetermined dose as a chewable or gelatin based dosage form, spray, gum, gel, cream, tablet, liquid or film. A device can include a housing that holds an amount of a pharmaceutical composition, including a polymeric matrix; a pharmaceutically active component in the polymeric matrix; and an adrenergic receptor interacter and an opening that dispenses a predetermined amount of the pharmaceutical composition. The device can also dispense a pharmaceutical composition including a permeation enhancer including a phenylpropanoid and/or a phytoextract.

In certain embodiments, a pharmaceutical composition can include a polymeric matrix, a pharmaceutically active component in the polymeric matrix; and a permeation enhancer including a phenylpropanoid and/or a phytoextract.

In certain embodiments, a pharmaceutical composition can include a polymeric matrix; a pharmaceutically active component in the polymeric matrix; and an interacter that creates increased blood flow or enables a flushing of the tissue to modify transmucosal uptake of the pharmaceutically active component.

In certain embodiments, a pharmaceutical composition can include a polymeric matrix; a pharmaceutically active component in the polymeric matrix; and an interacter that has a positive or negative heat of solution which are used as aids to modify (increase or decrease) transmucosal uptake.

In other embodiments, a pharmaceutical composition includes a polymeric matrix, a pharmaceutically active component in the polymeric matrix, and an interacter, the composition contained in a multilayer film having at least one side where the edges are coterminous.

In general, a method of treating a medical condition can include administering an effective amount of pharmaceutical composition, comprising a polymeric matrix, a pharmaceutically active component in the polymeric matrix, and an adrenergic receptor interacter. The pharmaceutically active component can be epinephrine, diazepam, or alprazolam. A medical condition can include a symptom of epilepsy, such as a seizure. In certain

embodiments, the method includes administering the pharmaceutical composition including diazepam during an ictal state. In certain embodiments, the method includes administering the pharmaceutical composition including diazepam during a periictal state. In certain embodiments, the method includes administering the pharmaceutical composition including diazepam during an interictal state. The medical condition can also include anxiety, drug withdrawal, parasomnia, alcohol withdrawal, muscle spasms, or seizure disorder. The medical condition can include treatment as a sedative. The medical condition can also include sedation for a medical procedure.

Other aspects, embodiments, and features will be apparent from the following description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE FIGURES

Referring to Figure 1A, a Franz diffusion cell 100 includes a donor compound 101, a donor chamber 102, a membrane 103, sampling port 104, receptor chamber 105, stir bar 106, and a heater/circulator 107.

Referring to Figure IB, a pharmaceutical composition is a film 100 comprising a polymeric matrix 200, the pharmaceutically active component 300 being contained in the polymeric matrix. The film can include a permeation enhancer 400.

Referring to Figures 2A and 2B, the graphs show the permeation of an active material from a composition. Referring to Figure 2A, this graph shows average amount of active material permeated vs. time, with 8.00 mg/mL epinephrine bitartrate and 4.4 mg/mL epinephrine base solubilized.

Referring to Figure 2B, this graph shows average flux vs. time, with 8.00 mg/mL bitartrate and 4.4 mg/mL epinephrine base solubilized.

Referring to Figure 3, this graph shows ex-vivo permeation of epinephrine bitartrate as a function of concentration. Referring to Figure 4, this graph shows permeation of epinephrine bitartrate as a function of solution pH. Referring to Figure 5, this graph shows the influence of enhancers on permeation of epinephrine, indicated as amount permeated as a function of time.

Referring to Figure 6A and 6B, these graphs show the release of epinephrine on polymer platforms (6A) and the effect of enhancers on its release (6B), indicated as amount permeated (in

pg) vs. time. Referring to Figure 7, this graph shows a pharmacokinetic model in the male Yucatan, miniature swine. The study compares a 0.3 mg Epipen, a 0.12 mg Epinephrine IV and a placebo film.

Referring to Figure 8, this graph shows the impact of no enhancer on the concentration profiles of a 40 mg Epinephrine film vs 0.3 mg Epipen. Referring to Figure 9, this graph shows the impact of Enhancer A (Labrasol) on the concentration profiles of a 40 mg Epinephrine film vs 0.3 mg Epipen, Referring to Figure 10, this graph shows the impact of Enhancer L (clove oil) on the concentration profiles of two 40 mg Epinephrine films (10 1) and (11 1) vs. a 0.3 mg Epipen.

Referring to Figure 11, this graph shows the impact of Enhancer L (clove oil) and film dimension (10 1 thinner, bigger film and 11 1 thicker, smaller film) on the concentration profiles of 40 mg Epinephrine films vs. a 0.3 mg Epipen.

Referring to Figure 12, this graph shows the concentration profiles for varying doses of Epinephrine films in a constant matrix for Enhancer L (clove oil) vs. a 0.3 mg Epipen. Referring to Figure 13, this graph shows the concentration profiles for varying doses of Epinephrine films in a constant matrix for Enhancer L (clove oil) vs. a 0.3 mg Epipen.

Referring to Figure 14, this graph shows the concentration profiles for varying doses of Epinephrine films in a constant matrix for Enhancer A (Labrasol) vs. a 0.3 mg Epipen.

Referring to Figure 15, this graph shows the influence of enhancers on permeation of diazepam, indicated as amount permeated as a function of time.

Referring to Figure 16, this graph shows the average flux as a function of time (diazepam + enhancers).

Referring to Figure 17, this graph shows the impact of Farnesol and Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

Referring to Figure 18, this graph shows the impact of Farnesol on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

Referring to Figure 19, this graph shows the impact of Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

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Referring to Figure 20, this graph shows the impact of Farnesol and Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

Referring to Figure 21, this graph shows the impact of Enhancer A (Labrasol) in combination with Enhancer L (clove oil) on the concentration profiles of a 40 mg Epinephrine films (also shown in Fig. 22), in logarithmic view.

Referring to Figure 22, this graph shows the impact of Enhancer A (Labrasol) in combination with Enhancer L (clove oil) on the concentration profiles of a 40 mg Epinephrine films vs. the average data collected from 0.3 mg Epipens.

Referring to Figure 23, this graph shows the impact of Enhancer A (Labrasol) in combination with Enhancer L (clove oil) on the concentration profiles of a 40 mg Epinephrine films, shown as separate animal subjects.

Referring to Figure 24A, this graph shows the alprazolam plasma concentration as a function of time following sublingual administration of alprazolam oral disintegrating tablets (ODT).

Referring to Figure 24B, this graph shows the alprazolam plasma concentration as a function of time following sublingual administration of alprazolam pharmaceutical composition films.

Referring to Figure 24C, this graph shows the alprazolam plasma concentration as a function of time following sublingual administration of alprazolam pharmaceutical composition films.

Referring to Figure 25A, this graph shows mean alprazolam plasma concentration as a function of time following sublingual administration of alprazolam ODTs and alprazolam pharmaceutical composition films.

Referring to Figure 25B, this graph shows the alprazolam function of time following sublingual administration.

Referring to Figure 25C, this graph shows the alprazolam function of time following sublingual administration.

Referring to Figure 26A, this graph shows the alprazolam plasma concentration plasma concentration plasma concentration as as as function of time following sublingual administration of alprazolam ODTs.

Referring to Figure 26B, this graph shows the alprazolam plasma concentration as a function of time following sublingual administration of alprazolam pharmaceutical composition films.

Referring to Figure 26C, this graph shows the alprazolam plasma concentration as a function of time following sublingual administration of alprazolam pharmaceutical composition films.

Referring to Figure 27A, this graph shows mean alprazolam function of time following sublingual administration of alprazolam composition films.

Referring to Figure 27B, this graph shows mean alprazolam function of time following sublingual administration of alprazolam composition films.

Referring to Figure 27C, this graph shows the alprazolam function of time following sublingual administration of alprazolam composition films.

plasma concentration as a ODTs and pharmaceutical plasma concentration as a ODTs and pharmaceutical plasma concentration as a ODTs and pharmaceutical

DETAILED DESCRIPTION

Mucosal surfaces, such as the oral mucosa, are a convenient route for delivering drugs to the body due to the fact that they are highly vascularized and permeable, providing increased bioavailability and rapid onset of action because it does not pass through the digestive system and thereby avoids first pass metabolism. In particular, the buccal and sublingual tissues offer advantageous sites for drug delivery because they are highly permeable regions of the oral mucosa, allowing drugs diffusing from the oral mucosa to have direct access to systemic circulation. This also offers increased convenience and therefore increased compliance in patients. For certain drugs, or pharmaceutically active components, a permeation enhancer can help to overcome the mucosal barrier and improve permeability. Permeation enhancers reversibly modulate the penetrability of the barrier layer in favor of drug absorption. Permeation enhancers facilitate transport of molecules through the epithelium. Absorption profiles and their rates can be controlled and modulated by a variety of parameters, such as but not limited to film size, drug loading, enhancer type/loading, polymer matrix release rate and mucosal residence time.

A pharmaceutical composition can be designed to deliver a pharmaceutically active component in a deliberate and tailored way. However, solubility and permeability of the pharmaceutically active component in vivo, in particular, in the mouth of a subject, can vary tremendously. A particular class of permeation enhancer can improve the uptake and bioavailability of the pharmaceutically active component in vivo. In particular, when delivered to the mouth via a film, the permeation enhancer can improve the permeability of the pharmaceutically active component through the mucosa and into the blood stream of the subject. The permeation enhancer can improve absorption rate and amount of the pharmaceutically active component by more than 5%, more than 10%, more than 20%, more than 30%, more than 40%, more than 50%, more than 60%, more than 70%, more than 80%, more than 90%, more than 100%, more than 150%, about 200% or more, or less than 200%, less than 150%, less than 100%, less than 90%, less than 80%, less than 70%, less than 60%, less than 50%, less than 40%, less than 30%, less than 20%, less than 10%, or less than 5%, or a combination of these ranges, depending on the other components in the composition.

In certain embodiments, a pharmaceutical composition has a suitable nontoxic, nonionic alkyl glycoside having a hydrophobic alkyl group joined by a linkage to a hydrophilic saccharide in combination with a mucosal delivery-enhancing agent selected from: (a) an aggregation inhibitory agent; (b) a charge-modifying agent; (c) a pH control agent; (d) a degradative enzyme inhibitory agent; (e) a mucolytic or mucus clearing agent; (f) a ciliostatic agent; (g) a membrane penetration-enhancing agent selected from: (i) a surfactant; (ii) a bile salt; (ii) a phospholipid additive, mixed micelle, liposome, or carrier; (iii) an alcohol; (iv) an enamine; (v) an NO donor compound; (vi) a long chain amphipathic molecule; (vii) a small hydrophobic penetration enhancer; (viii) sodium or a salicylic acid derivative; (ix) a glycerol ester of acetoacetic acid; (x) a cyclodextrin or beta-cyclodextrin derivative; (xi) a medium-chain fatty acid; (xii) a chelating agent; (xiii) an amino acid or salt thereof; (xiv) an N-acetylamino acid or salt thereof; (xv) an enzyme degradative to a selected membrane component; (ix) an inhibitor of fatty acid synthesis; (x) an inhibitor of cholesterol synthesis; and (xi) any combination of the membrane penetration enhancing agents recited in (i)-(x); (h) a modulatory agent of epithelial junction physiology; (i) a vasodilator agent; (j) a selective transport-enhancing agent; and (k) a stabilizing delivery vehicle, carrier, mucoadhesive, support or complex-forming species with which the compound is effectively combined, associated, contained, encapsulated or bound resulting in stabilization of

the compound for enhanced transmucosal delivery, wherein the formulation of the compound with the transmucosal delivery-enhancing agents provides for increased bioavailability of the compound in blood plasma of a subject. Penetration enhancers have been described in J. Nicolazzo, et al., J. of Controlled Disease, 105 (2005) 1-15, which is incorporated by reference herein. There are many reasons why the oral mucosa might be an attractive site for the delivery of therapeutic agents into the systemic circulation. Due to the direct drainage of blood from the buccal epithelium into the internal jugular vein first-pass metabolism in the liver and intestine may be avoided. First-pass effect can be a major reason for the poor bioavailability of some compounds when administered orally. Additionally, the mucosa lining the oral cavity is easily accessible, which ensures that a dosage form can be applied to the required site and can be removed easily in the case of an emergency. However, like the skin, the buccal mucosa acts as a barrier to the absorption of xenobiotics, which can hinder the permeation of compounds across this tissue. Consequently, the identification of safe and effective penetration enhancers has become a major goal in the quest to improve oral mucosal drug delivery.

Chemical penetration enhancers are substances that control the permeation rate of a coadministered drug through a biological membrane. While extensive research has focused on obtaining an improved understanding of how penetration enhancers might alter intestinal and transdermal permeability, far less is known about the mechanisms involved in buccal and sublingual penetration enhancement.

The buccal mucosa delineates the inside lining of the cheek as well as the area between the gums and upper and lower lips and it has an average surface area of 100 cm2. The surface of the buccal mucosa consists of a stratified squamous epithelium which is separated from the underlying connective tissue (lamina propria and submucosa) by an undulating basement membrane (a continuous layer of extracellular material approximately 1-2 pm in thickness). This stratified squamous epithelium consists of differentiating layers of cells which change in size, shape, and content as they travel from the basal region to the superficial region, where the cells are shed. There are approximately 40-50 cell layers, resulting in a buccal mucosa which is 500600 pm thick.

Structurally the sublingual mucosa is comparable to the buccal mucosa but the thickness of this epithelium is 100-200 pm. This membrane is also non-keratinised and being relatively thinner has been demonstrated to be more permeable than buccal mucosa. Blood flow to the

sublingual mucosal is slower compared with the buccal mucosa and is of the order of 1.0 ml/ min'Vcm'2.

The permeability of the buccal mucosa is greater than that of the skin, but less than that of the intestine. The differences in permeability are the result of structural differences between each of the tissues. The absence of organized lipid lamellae in the intercellular spaces of the buccal mucosa results in greater permeability of exogenous compounds, compared to keratinized epithelia of the skin; while the increased thickness and lack of tight junctions results in the buccal mucosa being less permeable than intestinal tissue.

The primary barrier properties of the buccal mucosa have been attributed to the upper one-third to one-quarter of the buccal epithelium. Researchers have learned that beyond the surface epithelium, the permeability barrier of nonkeratinized oral mucosa could also be attributed to contents extruded from the membrane-coating granules into the epithelial intercellular spaces.

The intercellular lipids of the nonkeratinized regions of the oral cavity are of a more polar nature than the lipids of the epidermis, palate, and gingiva, and this difference in the chemical nature of the lipids may contribute to the differences in permeability observed between these tissues. Consequently, it appears that it is not only the greater degree of intercellular lipid packing in the stratum comeum of keratinized epithelia that creates a more effective barrier, but also the chemical nature of the lipids present within that barrier.

The existence of hydrophilic and lipophilic regions in the oral mucosa has led researchers to postulate the existence of two routes of drug transport through the buccal mucosa— paracellular (between the cells) and transcellular (across the cells).

Since drug delivery through the buccal mucosa is limited by the barrier nature of the epithelium and the area available for absorption, various enhancement strategies are required in order to deliver therapeutically relevant amounts of drug to the systemic circulation. Various methods, including the use of chemical penetration enhancers, prodrugs, and physical methods may be employed to overcome the barrier properties of the buccal mucosa.

A chemical penetration enhancer, or absorption promoter, is a substance added to a pharmaceutical formulation in order to increase the membrane permeation or absorption rate of the coadministered drug, without damaging the membrane and/or causing toxicity. There have been many studies investigating the effect of chemical penetration enhancers on the delivery of

compounds across the skin, nasal mucosa, and intestine. In recent years, more attention has been given to the effect of these agents on the permeability of the buccal mucosa. Since permeability across the buccal mucosa is considered to be a passive diffusion process the steady state flux (Jss) should increase with increasing donor chamber concentration (CD) according to Fick’s first law of diffusion.

Surfactants and bile salts have been shown to enhance the permeability of various compounds across the buccal mucosa, both in vitro and in vivo. The data obtained from these studies strongly suggest that the enhancement in permeability is due to an effect of the surfactants on the mucosal intercellular lipids.

Fatty acids have been shown to enhance the permeation of a number of drugs through the skin, and this has been shown by differential scanning calorimetry and Fourier transform infrared spectroscopy to be related to an increase in the fluidity of intercellular lipids.

Additionally, pretreatment with ethanol has been shown to enhance the permeability of tritiated water and albumin across ventral tongue mucosa, and to enhance caffeine permeability across porcine buccal mucosa. There are also several reports of the enhancing effect of Azone® on the permeability of compounds through oral mucosa. Further, chitosan, a biocompatible and biodegradable polymer, has been shown to enhance drug delivery through various tissues, including the intestine and nasal mucosa.

Oral transmucosal drug delivery (OTDD) is the administration of pharmaceutically active agents through the oral mucosa to achieve systemic effects. Permeation pathways and predictive models for OTDD are described, e.g. in M. Sattar, Oral transmucosal drug delivery - Current status and future prospects, Int’L Journal of Pharmaceutics, 47(2014) 498-506, which is incorporated by reference herein. OTDD continues to attract the attention of academic and industrial scientists. Despite limited characterization of the permeation pathways in the oral cavity compared with skin and nasal routes of delivery, recent advances in our understanding of the extent to which ionized molecules permeate the buccal epithelium, as well as the emergence of new analytical techniques to study the oral cavity, and the progressing development of in silico models predictive of buccal and sublingual permeation, prospects are encouraging.

In order to deliver broader classes of drugs across the buccal mucosa, reversible methods of reducing the barrier potential of this tissue should be employed. This requisite has fostered the study of penetration enhancers that will safely alter the permeability restrictions of the buccal

mucosa. It has been shown that buccal penetration can be improved by using various classes of transmucosal and transdermal penetration enhancers such as bile salts, surfactants, fatty acids and their derivatives, chelators, cyclodextrins and chitosan. Among these chemicals used for the drug permeation enhancement, bile salts are the most common.

In vitro studies on enhancing effect of bile salts on the buccal permeation of compounds is discussed in Sevda Senel, Drug permeation enhancement via buccal route: possibilities and limitations, Journal of Controlled Release 72 (2001) 133-144, which is incorporated by reference herein. That article also discusses recent studies on the effects of buccal epithelial permeability of dihydroxy bile salts, sodium glycodeoxycholate (SGDC) and sodium taurodeoxycholate (TDC) and tri-hydroxy bile salts, sodium glycocholate (GC) and sodium taurocholate (TC) at 100 mM concentration including permeability changes correlated with the histological effects. Fluorescein isothiocyanate (FITC), morphine sulfate were each used as the model compound.

Chitosan has also been shown to promote absorption of small polar molecules and peptide / protein drugs through nasal mucosa in animal models and human volunteers. Other studies have shown an enhancing effect on penetration of compounds across the intestinal mucosa and cultured Caco-2 cells.

The permeation enhancer can be a phytoextract. A phytoextract can be an essential oil or composition including essential oils extracted by distillation of the plant material. In certain circumstances, the phytoextract can include synthetic analogues of the compounds extracted from the plant material (i.e., compounds made by organic synthesis). The phytoextract can include a phenylpropanoid, for example, phenyl alanine, eugenol, eugenol acetate, a cinnamic acid, a cinnamic acid ester, a cinnamic aldehyde, a hydrocinnamic acid, chavicol, or safrole, or a combination thereof. The phytoextract can be an essential oil extract of a clove plant, for example, from the leaf, stem or flower bud of a clove plant. The clove plant can be Syzygium aromaticum. The phytoextract can include 20-95% eugenol, including 40-95% eugenol, including 60-95% eugenol, and for example, 80-95% eugenol. The extract can also include 5% to 15% eugenol acetate. The extract can also include caryophyllene. The extract can also include up to 2.1% a-humulen. Other volatile compounds included in lower concentrations in clove essential oil can be β-pinene, limonene, farnesol, benzaldehyde, 2-heptanone or ethyl hexanoate. Other permeation enhancers may be added to the composition to improve absorption of the drug.

Suitable permeation enhancers include natural or synthetic bile salts such as sodium fusidate; glycocholate or deoxycholate and their salts; fatty acids and derivatives such as sodium laurate, oleic acid, oleyl alcohol, monoolein, or palmitoylcarnitine; chelators such as disodium EDTA, sodium citrate and sodium laurylsulfate, azone, sodium cholate, sodium 5-methoxysalicylate, sorbitan laurate, glyceryl monolaurate, octoxynonyl-9, laureth-9, polysorbates, sterols, or glycerides, such as caprylocaproyl polyoxylglycerides, e.g., Labrasol. The permeation enhancer can include phytoextract derivatives and/or monolignols. The permeation enhancer can also be a fungal extract.

Some natural products of plant origin have been known to have a vasodilatory effect. There are several mechanisms or modes by which plant-based products can evoke vasodilation. For review, see McNeill J.R. and Jurgens, T.M., Can. J. Physiol. Pharmacol. 84:803-821 (2006), which is incorporated by reference herein. Specifically, vasorelaxant effects of eugenol have been reported in a number of animal studies. See, e.g., Lahlou, S., et al., J. Cardiovasc. Pharmacol. 43:250-57 (2004), Damiani, C.E.N., et al., Vascular Pharmacol. 40:59-66 (2003), Nishijima, EL, et al., Japanese J. Pharmacol. 79:327-334 (1998), and Hume W.R., J. Dent Res. 62(9):1013-15 (1983), each of which is incorporated by reference herein. Calcium channel blockade was suggested to be responsible for vascular relaxation induced by a plant essential oil, or its main constituent, eugenol. See, Interaminense L.R.L. et al., Fundamental & Clin. Pharmacol. 21: 497-506 (2007), which is incorporated by reference herein.

Fatty acids can be used as inactive ingredients in drug preparations or drug vehicles. Fatty acids can also be used as formulation ingredients due to their certain functional effects and their biocompatible nature. Fatty acid, both free and as part of complex lipids, are major metabolic fuel (storage and transport energy), essential components of all membranes and gene regulators. For review, see Rustan A.C. and Drevon, C.A., Fatty Acids: Structures and Properties, Encyclopedia of Life Sciences (2005), which is incorporated by reference herein. There are two families of essential fatty acids that are metabolized in the human body: ω-3 and ω-6 polyunsaturated fatty acids (PUFAs). If the first double bond is found between the third and the fourth carbon atom from the ω carbon, they are called ω-3 fatty acids. If the first double bond is between the sixth and seventh carbon atom, they are called ω-6 fatty acids. PUFAs are further metabolized in the body by the addition of carbon atoms and by desaturation (extraction of hydrogen). Linoleic acid, which is a ω-6 fatty acid, is metabolized to γ-linolenic acid, dihomo-γ

linolinic acid, arachidonic acid, adrenic acid, tetracosatetraenoic acid, tetracosapentaenoic acid and docosapentaenoic acid, a-linolenic acid, which is a ω-3 fatty acid is metabolized to octadecatetraenoic acid, eicosatetraenoic acid, eicosapentaenoic acid (EPA), docosapentaenoic acid, tetracosapentaenoic acid, tetracosahexaenoic acid and docosahexaenoic acid (DHA).

It has been reported that fatty acids, such as palmitic acid, oleic acid, linoleic acid and eicosapentaenoic acid, induced relaxation and hyperpolarization of porcine coronary artery smooth muscle cells via a mechanism involving activation of the Na+K+-APTase pump and the fatty acids with increasing degrees of cv.s-unsaturation had higher potencies. See, Pomposiello, S.I. et al., Hypertension 31:615-20 (1998), which is incorporated by reference herein. Interestingly, the pulmonary vascular response to arachidonic acid, a metabolite of linoleic acid, can be either vasoconstrictive or vasodilative, depending on the dose, animal species, the mode of arachidonic acid administration, and the tones of the pulmonary circulation. For example, arachidonic acid has been reported to cause cyclooxygenase-dependent and -independent pulmonary vasodilation. See, Feddersen, C.O. et al., J. Appl. Physiol. 68(5):1799-808 (1990); and see, Spannhake, E.W., et al., J .Appl. Physiol. 44:397-495 (1978) and Wicks, T.C. et al., Circ. Res. 38:167-71 (1976), each of which is incorporated by reference herein.

Many studies have reported effects of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on vascular reactivity after being administered as ingestible forms. Some studies found that EPA-DHA or EPA alone suppressed the vasoconstrictive effect of norepinephrine or increased vasodilatory responses to acetylcholine in the forearm microcirculation. See, Chin, J.P.F, et al., Hypertension 21:22-8 (1993), and Tagawa, H. et al., J Cardiovasc Pharmacol 33:633-40 (1999), each of which is incorporated by reference herein. Another study found that both EPA and DHA increased systemic arterial compliance and tended to reduce pulse pressure and total vascular resistance. See, Nestel, P. et al., Am J. Clin. Nutr. 76:326-30 (2002), which is incorporated by reference herein. Meanwhile, a study found that DHA, but not EPA, enhanced vasodilator mechanisms and attenuates constrictor responses in forearm microcirculation in hyperlipidemic overweight men. See, Mori, T.A., et al., Circulation 102:1264-69 (2000), which is incorporated by reference herein. Another study found vasodilator effects of DHA on the rhythmic contractions of isolated human coronary arteries in vitro. See Wu, K.-T. et al., Chinese J. Physiol. 50(4):164-70 (2007), which is incorporated by reference herein.

The adrenergic receptors (or adrenoceptors) are a class of G protein-coupled receptors that are a target of catecholamines, especially norepinephrine (noradrenaline) and epinephrine (adrenaline). Epinephrine (adrenaline) interacts with both a- and β-adrenoceptors, causing vasoconstriction and vasodilation, respectively. Although a receptors are less sensitive to epinephrine, when activated, they override the vasodilation mediated by β-adrenoceptors because there are more peripheral al receptors than β-adrenoceptors. The result is that high levels of circulating epinephrine cause vasoconstriction. At lower levels of circulating epinephrine, βadrenoceptor stimulation dominates, producing vasodilation followed by decrease of peripheral vascular resistance. The al-adrenoreceptor is known for smooth muscle contraction, mydriasis, vasoconstriction in the skin, mucosa and abdominal vicera and sphincter contraction of the gastrointestinal (GI) tract and urinary bladder. The al-adrenergic receptors are member of the Gq protein-coupled receptor superfamily. Upon activation, a heterotrimeric G protein, Gq, activates phospholipase C (PLC). The mechanism of action involves interaction with calcium channels and changing the calcium content in a cell. For review, see Smith R. S. et al., Journal of Neurophysiology 102(2): 1103-14 (2009), which is incorporated by reference herein. Many cells possess these receptors.

al-adrenergic receptors can be a main receptor for fatty acids. For example, saw palmetto extract (SPE), widely used for the treatment of benign prostatic hyperplasia (BPH), has been reported to bind al-adrenergic, muscarinic and 1,4-dihydropyridine (1,4-DHP) calcium channel antagonist receptors. See, Abe M., et al., Biol. Pharm. Bull. 32(4) 646-650 (2009), and Suzuki M. et al., Acta Pharmacologica Sinica 30:271-81 (2009), each of which is incorporated by reference herein. SPE includes a variety of fatty acids including lauric acid, oleic acid, myristic acid, palmitic acid and linoleic acid. Lauric acid and oleic acid can bind noncompetitively to aladrenergic, muscarinic and 1,4-DHP calcium channel antagonist receptors.

In certain embodiments, a permeation enhancer can be an adrenergic receptor interacter. An adrenergic receptor interacter refers to a compound or substance that modifies and/or otherwise alters the action of an adrenergic receptor. For example, an adrenergic receptor interacter can prevent stimulation of the receptor by increasing, or decreasing their ability to bind. Such interacters can be provided in either short-acting or long-acting forms. Certain shortacting interacters can work quickly, but their effects last only a few hours. Certain long-acting interacters can take longer to work, but their effects can last longer. The interacter can be

selected and/or designed based on, e.g., one or more of the desired delivery and dose, active pharmaceutical ingredient, permeation modifier, permeation enhancer, matrix, and the condition being treated. An adrenergic receptor interacter can be an adrenergic receptor blocker. The adrenergic receptor interacter can be a terpene (e.g. volatile unsaturated hydrocarbons found in the essential oils of plants, derived from units of isoprenes) or a C3-C22 alcohol or acid, preferably a C7-C18 alcohol or acid. In certain embodiments, the adrenergic receptor interacter can include farnesol, linoleic acid, arachidonic acid, docosahexanoic acid, eicosapentanoic acid, and/or docosapentanoic acid. The acid can be a carboxylic acid, phosphoric acid, sulfuric acid, hydroxamic acid, or derivatives thereof. The derivative can be an ester or amide. For example, the adrenergic receptor interacter can be a fatty acid or fatty alcohol.

The C3-C22 alcohol or acid can be an alcohol or acid having a straight C3-C22 hydrocarbon chain, for example a C3-C22 hydrocarbon chain optionally containing at least one double bond, at least one triple bond, or at least one double bond and one triple bond; said hydrocarbon chain being optionally substituted with C!-4 alkyl, C2-4 alkenyl, C2-4 alkynyl, C!-4 alkoxy, hydroxyl, halo, amino, nitro, cyano, C3.5 cycloalkyl, 3-5 membered heterocycloalkyl, monocyclic aryl, 5-6 membered heteroaryl, C!.4 alkylcarbonyloxy, C!.4 alkyloxycarbonyl, C!.4 alkylcarbonyl, or formyl; and further being optionally interrupted by -O-, -N(Ra)-, -N(Ra)-C(0)O-, C(0)-N(Ra)-, -N(Ra)-C(0)-N(Rb)-, or -O-C(O)-O-. Each of Ra and Rb, independently, is hydrogen, alkyl, alkenyl, alkynyl, alkoxy, hydroxylalkyl, hydroxyl, or haloalkyl.

Fatty acids with a higher degree of unsaturation are effective candidates to enhance the permeation of drugs. Unsaturated fatty acids showed higher enhancement than saturated fatty acids, and the enhancement increased with the number of double bonds. See, A. Mittal, et al. Status of Fatty Acids as Skin Penetration Enhancers - A Review, Current Drug Delivery, 2009, 6, pp. 274-279, which is incorporated by reference herein. Position of double bond also affects the enhancing activity of fatty acids. Differences in the physicochemical properties of fatty acid which originate from differences in the double bond position most likely determine the efficacy of these compounds as skin penetration enhancers. Skin distribution increases as the position of the double bond is shifted towards the hydrophilic end. It has also been reported that fatty acid which has a double bond at an even number position more rapidly effects the perturbation of the structure of both the stratum comeum and the dermis than a fatty acid which has double bond at an odd number position. Cis-unsaturation in the chain can tend to increase activity.

An adrenergic receptor interacter can be a terpene. Hypotensive activity of terpenes in essential oils has been reported. See, Menezes I.A. et al., Z. Naturforsch. 65c:652-66 (2010), which is incorporated by reference herein. In certain embodiments, the permeation enhancer can be a sesquiterpene. Sesquiterpenes are a class of terpenes that consist of three isoprene units and have the empirical formula C!5H24. Like monoterpenes, sesquiterpenes may be acyclic or contain rings, including many unique combinations. Biochemical modifications such as oxidation or rearrangement produce the related sesquiterpenoids.

An adrenergic receptor interacter can be an unsaturated fatty acid such as linoleic acid. In certain embodiments, the permeation enhancer can be farnesol. Farnesol is a 15-carbon organic compound which is an acyclic sesquiterpene alcohol, which is a natural dephosphorylated form of farnesyl pyrophosphate. Under standard conditions, it is a colorless liquid. It is hydrophobic, and thus insoluble in water, but miscible with oils. Farnesol can be extracted from oils of plants such as citronella, neroli, cyclamen, and tuberose. It is an intermediate step in the biological synthesis of cholesterol from mevalonic acid in vertebrates. It has a delicate floral or weak citrus-lime odor and is used in perfumes and flavors. It has been reported that farnesol selectively kills acute myeloid leukemia blasts and leukemic cell lines in preference to primary hemopoietic cells. See, Rioja A. et al., FEBS Lett 467 (2-3): 291-5 (2000), which is incorporated by reference herein. Vasoactive properties of farnesyl analogues have been reported. See, Roullet, J.-B., et al., J. Clin. Invest., 1996, 97:2384-2390, which is incorporated by reference herein. Both Farnesol and N-acetyl-S-trans, trans-farnesyl-L-cysteine (AFC), a synthetic mimic of the carboxyl terminus of farnesylated proteins inhibited vasoconstriction in rat aortic rings.

In certain embodiments, an interacter can be an aporphine alkaloid. For example, an interacter can be a dicentrine.

In general, an interacter can also be a vasodilator or a therapeutic vasodilator. Vasodilators are drugs that open or widen blood vessels. They are typically used to treat hypertension, heart failure and angina, but can be used to treat other conditions as well, including glaucoma for example. Some vasodilators that act primarily on resistance vessels (arterial dilators) are used for hypertension, and heart failure, and angina; however, reflex cardiac stimulation makes some arterial dilators unsuitable for angina. Venous dilators are very effective for angina, and sometimes used for heart failure, but are not used as primary therapy for

hypertension. Vasodilator drugs can be mixed (or balanced) vasodilators in that they dilate both arteries and veins and therefore can have wide application in hypertension, heart failure and angina. Some vasodilators, because of their mechanism of action, also have other important actions that can in some cases enhance their therapeutic utility or provide some additional therapeutic benefit. For example, some calcium channel blockers not only dilate blood vessels, but also depress cardiac mechanical and electrical function, which can enhance their antihypertensive actions and confer additional therapeutic benefit such as blocking arrhythmias.

Vasodilator drugs can be classified based on their site of action (arterial versus venous) or by mechanism of action. Some drugs primarily dilate resistance vessels (arterial dilators; e.g., hydralazine), while others primarily affect venous capacitance vessels (venous dilators; e.g., nitroglycerine). Many vasodilator drugs have mixed arterial and venous dilator properties (mixed dilators; e.g., alpha-adrenoceptor antagonists, angiotensin converting enzyme inhibitors), such as phentolamine.

It is more common, however, to classify vasodilator drugs based on their primary mechanism of action. The figure to the right depicts important mechanistic classes of vasodilator drugs. These classes of drugs, as well as other classes that produce vasodilation, include: alphaadrenoceptor antagonists (alpha-blockers); Angiotensin converting enzyme (ACE) inhibitors; Angiotensin receptor blockers (ARBs); beta2־adrenoceptor agonists (32-agonists); calciumchannel blockers (CCBs); centrally acting sympatholytics; direct acting vasodilators; endothelin receptor antagonists; ganglionic blockers; nitrodilators; phosphodiesterase inhibitors; potassiumchannel openers; renin inhibitors.

In general, the active or inactive components or ingredients can be substances or compounds that create an increased blood flow or flushing of the tissue to enable a modification or difference (increase or decrease) in transmucosal uptake of the API(s), and/or have a positive or negative heat of solution which are used as aids to modify (increase or decrease) transmucosal uptake.

Sequence of Permeation Enhancer(s) and Active Pharmaceutical Ingredient(s)

The arrangement, order, or sequence of penetration enhancer(s) and active pharmaceutical ingredient(s)(API(s)) delivered to the desired mucosal surface can vary in order to deliver a desired pharmacokinetic profile. For example, one can apply the permeation enhancer(s) first by a film, by swab, spray, gel, rinse or by a first layer of a film then apply the

API(s) by single film, by swab, or by a second layer of a film. The sequence can be reversed or modified, for example, by applying the API(s) first by film, by swab, or by a first layer of a film, and then applying the permeation enhancer(s) by a film, by swab, spray, gel, rinse or by a second layer of a film. In another embodiment, one may apply a permeation enhancer(s) by a film, and a drug by a different film. For example, the permeation enhancer(s) film positioned under a film containing the API(s), or the film containing the API(s) positioned under a film containing the permeation enhancer(s), depending on the desired pharmacokinetic profile.

For example, the penetration enhancer(s) can be used as a pretreatment alone or in combination with at least one API to precondition the mucosa for further absorption of the API(s). The treatment can be followed by another treatment with neat penetration enhancer(s) to follow the at least one API mucosal application. The pretreatment can be applied as a separate treatment (film, gel, solution, swab etc.) or as a layer within a multilayered film construction of one or more layers. Similarly, the pretreatment may be contained within a distinct domain of a single film, designed to dissolve and release to the mucosa prior to release of the secondary domains with or without penetration enhancer(s) or API(s). The active ingredient may then be delivered from a second treatment, alone or in combination with additional penetration enhancer(s). There may also be a tertiary treatment or domain that delivers additional penetration enhancer(s) and/or at least one API(s) or prodrug(s), either at a different ratio relative to each other or relative to the overall loading of the other treatments. This allows a custom pharmacokinetic profile to be obtained. In this way, the product may have single or multiple domains, with penetration enhancer(s) and API(s) that can vary in mucosal application order, composition, concentration, or overall loading that leads to the desired absorption amounts and/or rates that achieve the intended pharmacokinetic profile and/or pharmacodynamic effect.

The film format can be oriented such that no distinct sides, or such that the film has at least one side of a multiple layer film where the edges are co-terminus (having or meeting at a shared border or limit).

The pharmaceutical composition can be a chewable or gelatin based dosage form, spray, gum, gel, cream, tablet, liquid or film. The composition can include textures, for example, at the surface, such as microneedles or micro-protrusions. Recently, the use of micron-scale needles in increasing skin permeability has been shown to significantly increase transdermal delivery, including and especially for macromolecules. Most drug delivery studies have emphasized solid

microneedles, which have been shown to increase skin permeability to a broad range of molecules and nanoparticles in vitro. In vivo studies have demonstrated delivery of oligonucleotides, reduction of blood glucose level by insulin, and induction of immune responses from protein and DNA vaccines. For such studies, needle arrays have been used to pierce holes into skin to increase transport by diffusion or iontophoresis or as drug carriers that release drug into the skin from a microneedle surface coating. Hollow microneedles have also been developed and shown to microinject insulin to diabetic rats. To address practical applications of microneedles, the ratio of microneedle fracture force to skin insertion force (i.e. margin of safety) was found to be optimal for needles with small tip radius and large wall thickness. Microneedles inserted into the skin of human subjects were reported as painless. Together, these results suggest that microneedles represent a promising technology to deliver therapeutic compounds into the skin for a range of possible applications. Using the tools of the microelectronics industry, microneedles have been fabricated with a range of sizes, shapes and materials. Microneedles can be, for example, polymeric, microscopic needles that deliver encapsulated drugs in a minimally invasive manner, but other suitable materials can be used.

Applicants have found that microneedles could be used to enhance the delivery of drugs through the oral mucosa, particularly with the claimed compositions. The microneedles create micron sized pores in the oral mucosa which can enhance the delivery of drugs across the mucosa. Solid, hollow, or dissolving microneedles can be fabricated out of suitable materials including, but not limited to, metal, polymer, glass and ceramics. The microfabrication process can include photolithography, silicon etching, laser cutting, metal electroplating, metal electro polishing and molding. Microneedles could be solid which is used to pretreat the tissue and are removed before applying the film. The drug loaded polymer film described in this application can be used as the matrix material of the microneedles itself. These films can have microneedles or micro protrusions fabricated on their surface which will dissolve after forming microchannels in the mucosa through which drugs can permeate.

The term “film” can include films and sheets, in any shape, including rectangular, square, or other desired shape. A film can be any desired thickness and size. In preferred embodiments, a film can have a thickness and size such that it can be administered to a user, for example, placed into the oral cavity of the user. A film can have a relatively thin thickness of from about 0.0025 mm to about 0.250 mm, or a film can have a somewhat thicker thickness of from about

0.250 mm to about 1.0 mm. For some films, the thickness may be even larger, i.e., greater than about 1.0 mm or thinner, i.e., less than about 0.0025 mm. A film can be a single layer or a film can be multi-layered, including laminated or multiple cast films. A permeation enhancer and pharmaceutically active component can be combined in a single layer, each contained in separate layers, or can each be otherwise contained in discrete regions of the same dosage form. In certain embodiments, the pharmaceutically active component contained in the polymeric matrix can be dispersed in the matrix. In certain embodiments, the permeation enhancer being contained in the polymeric matrix can be dispersed in the matrix.

Oral dissolving films can fall into three main classes: fast dissolving, moderate dissolving and slow dissolving. Oral dissolving films can also include a combination of any of the above categories. Fast dissolving films can dissolve in about 1 second to about 30 seconds in the mouth, including more than 1 second, more than 5 seconds, more than 10 seconds, more than 20 seconds, and less than 30 seconds. Moderate dissolving films can dissolve in about 1 to about 30 minutes in the mouth including more than 1 minute, more than 5 minutes, more than 10 minutes, more than 20 minutes or less than 30 minutes, and slow dissolving films can dissolve in more than 30 minutes in the mouth. As a general trend, fast dissolving films can include (or consist of) low molecular weight hydrophilic polymers (e.g., polymers having a molecular weight between about 1,000 to 9,000 daltons, or polymers having a molecular weight up to 200,000 daltons). In contrast, slow dissolving films generally include high molecular weight polymers (e.g., having a molecular weight in millions). Moderate dissolving films can tend to fall in between the fast and slow dissolving films.

It can be preferable to use films that are moderate dissolving films. Moderate dissolving films can dissolve rather quickly, but also have a good level of mucoadhesion. Moderate dissolving films can also be flexible, quickly wettable, and are typically non-irritating to the user. Such moderate dissolving films can provide a quick enough dissolution rate, most desirably between about 1 minute and about 20 minutes, while providing an acceptable mucoadhesion level such that the film is not easily removable once it is placed in the oral cavity of the user. This can ensure delivery of a pharmaceutically active component to a user.

A pharmaceutical composition can include one or more pharmaceutically active components. The pharmaceutically active component can be a single pharmaceutical component or a combination of pharmaceutical components. The pharmaceutically active component can be

an anti-inflammatory analgesic agent, a steroidal anti-inflammatory agent, an antihistamine, a local anesthetic, a bactericide, a disinfectant, a vasoconstrictor, a hemostatic, a chemotherapeutic drug, an antibiotic, a keratolytic, a cauterizing agent, an antiviral drug, an antirheumatic, an antihypertensive, a bronchodilator, an anticholinergic, an anti-anxiety drug, an antiemetic compound, a hormone, a peptide, a protein or a vaccine. The pharmaceutically active component can be the compound, pharmaceutically acceptable salt of a drug, a prodrug, a derivative, a drug complex or analog of a drug. The term “prodrug” refers to a biologically inactive compound that can be metabolized in the body to produce a biologically active drug.

In some embodiments, more than one pharmaceutically active component may be included in the film. The pharmaceutically active components can be ace-inhibitors, anti-anginal drugs, anti-arrhythmias, anti-asthmatics, anti-cholesterolemics, analgesics, anesthetics, anticonvulsants, anti-depressants, anti-diabetic agents, anti-diarrhea preparations, antidotes, antihistamines, anti-hypertensive drugs, anti-inflammatory agents, anti-lipid agents, anti-manics, anti-nauseants, anti-stroke agents, anti-thyroid preparations, amphetamines, anti-tumor drugs, anti-viral agents, acne drugs, alkaloids, amino acid preparations, anti-tussives, anti-uricemic drugs, anti-viral drugs, anabolic preparations, systemic and non-systemic anti-infective agents, anti-neoplastics, anti-parkinsonian agents, anti-rheumatic agents, appetite stimulants, blood modifiers, bone metabolism regulators, cardiovascular agents, central nervous system stimulates, cholinesterase inhibitors, contraceptives, decongestants, dietary supplements, dopamine receptor agonists, endometriosis management agents, enzymes, erectile dysfunction therapies, fertility agents, gastrointestinal agents, homeopathic remedies, hormones, hypercalcemia and hypocalcemia management agents, immunomodulators, immunosuppressives, migraine preparations, motion sickness treatments, muscle relaxants, obesity management agents, osteoporosis preparations, oxytocics, parasympatholytics, parasympathomimetics, prostaglandins, psychotherapeutic agents, respiratory agents, sedatives, smoking cessation aids, sympatholytics, tremor preparations, urinary tract agents, vasodilators, laxatives, antacids, ion exchange resins, anti-pyretics, appetite suppressants, expectorants, anti-anxiety agents, anti-ulcer agents, anti-inflammatory substances, coronary dilators, cerebral dilators, peripheral vasodilators, psycho-tropics, stimulants, anti-hypertensive drugs, vasoconstrictors, migraine treatments, antibiotics, tranquilizers, anti-psychotics, anti-tumor drugs, anti-coagulants, antithrombotic drugs, hypnotics, anti-emetics, anti-nauseants, anti-convulsants, neuromuscular

drugs, hyper- and hypo-glycemic agents, thyroid and anti-thyroid preparations, diuretics, antispasmodics, uterine relaxants, anti-obesity drugs, erythropoietic drugs, anti-asthmatics, cough suppressants, mucolytics, DNA and genetic modifying drugs, diagnostic agents, imaging agents, dyes, or tracers, and combinations thereof.

For example, the pharmaceutically active component can be buprenorphine, naloxone, acetaminophen, riluzole, clobazam, Rizatriptan, propofol, methyl salicylate, monoglycol salicylate, aspirin, mefenamic acid, flufenamic acid, indomethacin, diclofenac, alclofenac, diclofenac sodium, ibuprofen, ketoprofen, naproxen, pranoprofen, fenoprofen, sulindac, fenclofenac, clidanac, flurbiprofen, fentiazac, bufexamac, piroxicam, phenylbutazone, oxyphenbutazone, clofezone, pentazocine, mepirizole, tiaramide hydrochloride, hydrocortisone, predonisolone, dexamethasone, triamcinolone acetonide, fluocinolone acetonide, hydrocortisone acetate, predonisolone acetate, methylpredonisolone, dexamethasone acetate, betamethasone, betamethasone valerate, flumetasone, fluoromethoIone, beclomethasone diproprionate, fluocinonide, edaravone, lurasidone, esomeprazole, lumateperone, naldmedine, doxylamine, pyridoxine, diphenhydramine hydrochloride, diphenhydramine salicylate, diphenhydramine, chlorpheniramine hydrochloride, chlorpheniramine maleate isothipendyl hydrochloride, tripelennamine hydrochloride, promethazine hydrochloride, methdilazine hydrochloride dibucaine hydrochloride, dibucaine, lidocaine hydrochloride, lidocaine, benzocaine, pbuthylaminobenzoic acid 2-(die-ethylamino) ethyl ester hydrochloride, procaine hydrochloride, tetracaine, tetracaine hydrochloride, chloroprocaine hydrochloride, oxyprocaine hydrochloride, mepivacaine, cocaine hydrochloride, piperocaine hydrochloride, dyclonine, dyclonine hydrochloride, thimerosal, phenol, thymol, benzalkonium chloride, benzethonium chloride, chlorhexidine, povidone iodide, cetylpyridinium chloride, eugenol, trimethylammonium bromide, naphazoline nitrate, tetrahydrozoline hydrochloride, oxymetazoline hydrochloride, phenylephrine hydrochloride, tramazoline hydrochloride, thrombin, phytonadione, protamine sulfate, aminocaproic acid, tranexamic acid, carbazochrome, carbaxochrome sodium sulfanate, rutin, hesperidin, sulfamine, sulfathiazole, sulfadiazine, homosulfamine, sulfisoxazole, sulfisomidine, sulfamethizole, nitrofurazone, penicillin, meticillin, oxacillin, cefalotin, cefalordin, erythromcycin, lincomycin, tetracycline, chlortetracycline, oxytetracycline, metacycline, chloramphenicol, kanamycin, streptomycin, gentamicin, bacitracin, cycloserine, salicylic acid, podophyllum resin, podolifox, cantharidin, chloroacetic acids, silver nitrate,

protease inhibitors, thymadine kinase inhibitors, sugar or glycoprotein synthesis inhibitors, structural protein synthesis inhibitors, attachment and adsorption inhibitors, and nucleoside analogues such as acyclovir, penciclovir, valacyclovir, and ganciclovir, heparin, insulin, LHRH, TRH, interferons, oligonuclides, calcitonin, octreotide, omeprazone, fluoxetine, ethinylestradiol, amiodipine, paroxetine, enalapril, lisinopril, leuprolide, prevastatin, lovastatin, norethindrone, risperidone, olanzapine, albuterol, hydrochlorothiazide, pseudoephridrine, warfarin, terazosin, cisapride, ipratropium, busprione, methylphenidate, levothyroxine, zolpidem, levonorgestrel, glyburide, benazepril, medroxyprogesterone, clonazepam, ondansetron, losartan, quinapril, nitroglycerin, midazolam versed, cetirizine, doxazosin, glipizide, vaccine hepatitis B, salmeterol, sumatriptan, triamcinolone acetonide, goserelin, beclomethasone, granisteron, desogestrel, alprazolam, estradiol, nicotine, interferon beta 1A, cromolyn, fosinopril, digoxin, fluticasone, bisoprolol, calcitril, captorpril, butorphanol, clonidine, premarin, testosterone, sumatriptan, clotrimazole, bisacodyl, dextromethorphan, nitroglycerine, nafarelin, dinoprostone, nicotine, bisacodyl, goserelin, or granisetron. In certain embodiments, the pharmaceutically active component can be epinephrine, a benzodiazepine such as diazepam or lorazepam or alprazolam.

Epinephrine, Diazepam and Alprazolam Examples

In one example, a composition including epinephrine or its salts or esters can have a biodelivery profile similar to that of epinephrine administered by injection, for example, using an EpiPen. Epinephrine can be present in an amount of from about .01 mg to about 100 mg per dosage, for example, at a 0.1 mg, 5 mg, 10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, 70 mg, 80 mg, 90 mg or 100 mg dosage, including greater than 0.1 mg, more than 5 mg, more than 20 mg, more than 30 mg, more than 40 mg, more than 50 mg, more than 60 mg, more than 70 mg, more than 80 mg, more than 90 mg, or less than 100 mg, less than 90 mg, less than 80 mg, less than 70 mg, less than 60 mg, less than 50 mg, less than 40 mg, less than 30 mg, less than 20 mg, less than 10 mg, or less than 5 mg, or any combination thereof. In another example, a composition including diazepam can have a biodelivery profile similar to that of a diazepam tablet or gel, or better. Diazepam or its salts can be present in an amount of from about 0.5 mg to about 100 mg per dosage, for example, at a 0.5 mg, 1 mg, 5 mg, 10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, 70 mg, 80 mg, 90 mg or 100 mg dosage including greater than 1 mg, more than 5 mg, more than 20 mg, more than 30 mg, more than 40 mg, more than 50 mg, more than 60 mg, more than 70 mg, more than 80 mg, more than 90 mg, or less than 100 mg, less than 90 mg, less than 80 mg,

less than 70 mg, less than 60 mg, less than 50 mg, less than 40 mg, less than 30 mg, less than 20 mg, less than 10 mg, or less than 5 mg, or any combination thereof.

In another example, a composition (e.g., including alprazolam, diazepam or epinephrine) can have a suitable nontoxic, nonionic alkyl glycoside having a hydrophobic alkyl group joined by a linkage to a hydrophilic saccharide in combination with a mucosal delivery-enhancing agent selected from: (a) an aggregation inhibitory agent; (b) a charge-modifying agent; (c) a pH control agent; (d) a degradative enzyme inhibitory agent; (e) a mucolytic or mucus clearing agent; (f) a ciliostatic agent; (g) a membrane penetration-enhancing agent selected from: (i) a surfactant; (ii) a bile salt; (ii) a phospholipid additive, mixed micelle, liposome, or carrier; (iii) an alcohol; (iv) an enamine; (v) an NO donor compound; (vi) a long chain amphipathic molecule; (vii) a hydrophobic penetration enhancer; (viii) sodium or a salicylic acid derivative; (ix) a glycerol ester of acetoacetic acid; (x) a cyclodextrin or beta-cyclodextrin derivative; (xi) a medium-chain fatty acid; (xii) a chelating agent; (xiii) an amino acid or salt thereof; (xiv) an N-acetylamino acid or salt thereof; (xv) an enzyme degradative to a selected membrane component; (ix) an inhibitor of fatty acid synthesis; (x) an inhibitor of cholesterol synthesis; and (xi) any combination of the membrane penetration enhancing agents recited in (i)-(x); (h) a modulatory agent of epithelial junction physiology; (i) a vasodilator agent; (j) a selective transport-enhancing agent; or (k) a stabilizing delivery vehicle, carrier, mucoadhesive, support or complex-forming species with which the compound is effectively combined, associated, contained, encapsulated or bound resulting in stabilization of the compound for enhanced mucosal delivery, wherein the formulation of the compound with the transmucosal delivery-enhancing agents provides for increased bioavailability of the compound in a blood plasma of a subject. The formulation can include approximately the same active pharmaceutical ingredient (API): enhancer ratio as in the other examples for diazepam and alprazolam.

Treatment or Adjunctive Treatment

Status epilepticus (SE) is an epileptic seizure of greater than five minutes or more than one seizure within a five-minute period without the person returning to normal between them. Other previous definitions used a 30-minute time limit. Benzodiazepines are some of the most effective drugs in the treatment of acute seizures and status epilepticus. The benzodiazepines most commonly used to treat status epilepticus include diazepam (Valium), lorazepam (Ativan), or midazolam (Versed). The pharmaceutically active components in a pharmaceutical

composition (e.g. pharmaceutical composition film) can be a treatment or adjunctive treatment for Angelman syndrome (AS), Benign rolandic epilepsy of childhood (BREC) and benign rolandic epilepsy with centro-temporal spikes (BECTS), CDKL5 disorder, Childhood absence epilepsy (CAE), Myoclonic-astatic epilepsy or Doose Syndrome, Dravet syndrome, Early Myoclonic Encephalopathy (EME), Epilepsy with generalized tonic-clonic seizures alone (EGTCS) or epilepsy with tonic-clonic seizures on awakening, Epilepsy with MyoclonicAbsences Frontal lobe epilepsy, Glutl Deficiency Syndrome, Hypothalamic hamartoma (HH), Infantile spasms (also called IS) or West syndrome, Juvenile absence epilepsy (JAE), Juvenile myoclonic epilepsy (JME), Lafora progressive myoclonus epilepsy (Lafora disease), LandauKleffner syndrome, Lennox-Gastaut Syndrome (LGS), Ohtahara Syndrome (OS), Panayiotopoulos Syndrome (PS), PCDH19 Epilepsy, Progressive myoclonic epilepsies, Rasmussen's syndrome Ring chromosome 20 syndrome (RC20), Reflex epilepsies, TBCKrelated intellectual disability syndrome, Temporal lobe epilepsy and Neurocutaneous syndromes that can be associated with seizures including Incontinentia pigmenti, Neurofibromatosis Type 1, Sturge Weber Syndrome (Encephalotrigeminal Angiomatosis), and Tuberous Sclerosis Complex.

A film and/or its components can be water-soluble, water swellable or water-insoluble. The term “water-soluble” can refer to substances that are at least partially dissolvable in an aqueous solvent, including but not limited to water. The term “water-soluble” may not necessarily mean that the substance is 100% dissolvable in the aqueous solvent. The term “water-insoluble” refers to substances that are not dissolvable in an aqueous solvent, including but not limited to water. A solvent can include water, or alternatively can include other solvents (preferably, polar solvents) by themselves or in combination with water.

The composition can include a polymeric matrix. Any desired polymeric matrix may be used, provided that it is orally dissolvable or erodible. The dosage should have enough bioadhesion to not be easily removed and it should form a gel like structure when administered. They can be moderate-dissolving in the oral cavity and particularly suitable for delivery of pharmaceutically active components, although both fast release, delayed release, controlled release and sustained release compositions are also among the various embodiments contemplated.

Branched Polymers

The pharmaceutical composition film can include dendritic polymers which can include highly branched macromolecules with various structural architectures. The dendritic polymers can include dendrimers, dendronised polymers (dendrigrafted polymers), linear dendritic hybrids, multi-arm star polymers, or hyperbranched polymers.

Hyperbranched polymers are highly branched polymers with imperfections in their structure. However, they can be synthesized in a single step reaction which can be an advantage over other dendritic structures and are therefore suitable for bulk volume applications. The properties of these polymers apart from their globular structure are the abundant functional groups, intramolecular cavities, low viscosity and high solubility. Dendritic polymers have been used in several drug delivery applications. See, e.g., Dendrimers as Drug Carriers: Applications in Different Routes of Drug Administration. J Pharm Sci, VOL. 97, 2008, 123-143, which is incorporated by reference herein.

The dendritic polymers can have internal cavities which can encapsulate drugs. The steric hindrance caused by the highly dense polymer chains might prevent the crystallization of the drugs. Thus, branched polymers can provide additional advantages in formulating crystallizable drugs in a polymer matrix.

Examples of suitable dendritic polymers include poly(ether) based dendrons, dendrimers and hyperbranched polymers, poly(ester) based dendrons, dendrimers and hyperbranched polymers, poly(thioether) based dendrons, dendrimers and hyperbranched polymers, poly(amino acid) based dendrons dendrimers and hyperbranched polymers, poly(arylalkylene ether) based dendrons, dendrimers and hyperbranched polymers, poly(alkyleneimine) based dendrons, dendrimers and hyperbranched polymers, poly(amidoamine) based dendrons, dendrimers or hyperbranched polymers.

Other examples of hyperbranched polymers include poly(amines)s, polycarbonates, poly(ether ketone)s, polyurethanes, polycarbosilanes, polysiloxanes, poly(ester amine)s, poly(sulfone amine)s, poly(urea urethane)s or polyether polyols such as polyglycerols.

A film can be produced by a combination of at least one polymer and a solvent, optionally including other components. The solvent may be water, a polar organic solvent including, but not limited to, ethanol, isopropanol, acetone, or any combination thereof. In some

embodiments, the solvent may be a non-polar organic solvent, such as methylene chloride. The film may be prepared by utilizing a selected casting or deposition method and a controlled drying process. For example, the film may be prepared through a controlled drying processes, which include application of heat and/or radiation energy to the wet film matrix to form a visco-elastic structure, thereby controlling the uniformity of content of the film. The controlled drying processes can include air alone, heat alone or heat and air together contacting the top of the film or bottom of the film or the substrate supporting the cast or deposited or extruded film or contacting more than one surface at the same time or at different times during the drying process. Some of such processes are described in more detail in U.S. Patent No. 8,765,167 and U.S. Patent No. 8,652,378, which are incorporated by reference herein. Alternatively, the films may be extruded as described in U.S. Patent Publication No. 2005/0037055 Al, which is incorporated by reference herein.

A polymer included in the films may be water-soluble, water-swellable, water-insoluble, or a combination of one or more either water-soluble, water-swellable or water-insoluble polymers. The polymer may include cellulose, cellulose derivatives or gums. Specific examples of useful water-soluble polymers include, but are not limited to, polyethylene oxide, pullulan, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl pyrrolidone, carboxymethyl cellulose, polyvinyl alcohol, sodium alginate, polyethylene glycol, xanthan gum, tragancanth gum, guar gum, acacia gum, arabic gum, polyacrylic acid, methylmethacrylate copolymer, carboxyvinyl copolymers, starch, gelatin, and combinations thereof. Specific examples of useful water-insoluble polymers include, but are not limited to, ethyl cellulose, hydroxypropyl ethyl cellulose, cellulose acetate phthalate, hydroxypropyl methyl cellulose phthalate and combinations thereof. For higher dosages, it may be desirable to incorporate a polymer that provides a high level of viscosity as compared to lower dosages.

As used herein the phrase water-soluble polymer and variants thereof refer to a polymer that is at least partially soluble in water, and desirably fully or predominantly soluble in water, or absorbs water. Polymers that absorb water are often referred to as being water-swellable polymers. The materials useful with the present invention may be water-soluble or waterswell able at room temperature and other temperatures, such as temperatures exceeding room temperature. Moreover, the materials may be water-soluble or water-swellable at pressures less

than atmospheric pressure. In some embodiments, films formed from such water-soluble polymers may be sufficiently water-soluble to be dissolvable upon contact with bodily fluids.

Other polymers useful for incorporation into the films include biodegradable polymers, copolymers, block polymers or combinations thereof. It is understood that the term biodegradable is intended to include materials that chemically degrade, as opposed to materials that physically break apart (i.e., bioerodable materials). The polymers incorporated in the films can also include a combination of biodegradable or bioerodable materials. Among the known useful polymers or polymer classes which meet the above criteria are: poly(glycolic acid) (PGA), poly(lactic acid) (PLA), polydioxanes, polyoxalates, poly(alpha-esters), polyanhydrides, polyacetates, polycaprolactones, poly(orthoesters), polyamino acids, polyaminocarbonates, polyurethanes, polycarbonates, polyamides, poly(alkyl cyanoacrylates), and mixtures and copolymers thereof. Additional useful polymers include, stereopolymers of L- and D-lactic acid, copolymers of bis(p-carboxyphenoxy)propane acid and sebacic acid, sebacic acid copolymers, copolymers of caprolactone, poly(lactic acid)/poly(glycolic acid)/polyethyleneglycol copolymers, copolymers of polyurethane and (poly(lactic acid), , copolymers of alpha-amino acids, and caproic acid, copolymers of alpha-benzyl glutamate and polyethylene glycol, copolymers of succinate and poly(glycols), polyphosphazene, polyhydroxy-alkanoates or mixtures thereof. The polymer matrix can include one, two, three, four or more components.

Although a variety of different polymers may be used, it is desired to select polymers that provide mucoadhesive properties to the film, as well as a desired dissolution and/or disintegration rate. In particular, the time period for which it is desired to maintain the film in contact with the mucosal tissue depends on the type of pharmaceutically active component contained in the composition. Some pharmaceutically active components may only require a few minutes for delivery through the mucosal tissue, whereas other pharmaceutically active components may require up to several hours or even longer. Accordingly, in some embodiments, one or more water-soluble polymers, as described above, may be used to form the film. In other embodiments, however, it may be desirable to use combinations of water-soluble polymers and polymers that are water-swellable, water-insoluble and/or biodegradable, as provided above. The inclusion of one or more polymers that are water-swellable, water-insoluble and/or biodegradable may provide films with slower dissolution or disintegration rates than films formed from water-soluble polymers alone. As such, the film may adhere to the mucosal tissue

for longer periods of time, such as up to several hours, which may be desirable for delivery of certain pharmaceutically active components.

Desirably, an individual film dosage of the pharmaceutical film can have a suitable thickness, and small size, which is between about 0.0625-3 inch by about 0.0625-3 inch. The film size can also be greater than 0.0625 inch, greater than 0.5 inch, greater than 1 inch, greater than 2 inches, about 3 inches, or greater than 3 inches, less than 3 inches, less than 2 inches, less than 1 inch, less than 0.5 inch, less than 0.0625 inch in at least one aspect, or greater than 0.0625 inch, greater than 0.5 inch, greater than 1 inch, greater than 2 inches, or greater than 3 inches, about 3 inches, less than 3 inches, less than 2 inches, less than 1 inch, less than 0.5 inch, or less than 0.0625 inch in another aspect. The aspect ratio, including thickness, length, and width can be optimized by a person of ordinary skill in the art based on the chemical and physical properties of the polymeric matrix, the active pharmaceutical ingredient, dosage, enhancer, and other additives involved as well as the dimensions of the desired dispensing unit. The film dosage should have good adhesion when placed in the buccal cavity or in the sublingual region of the user. Further, the film dosage should disperse and dissolve at a moderate rate, most desirably dispersing within about 1 minute and dissolving within about 3 minutes. In some embodiments, the film dosage may be capable of dispersing and dissolving at a rate of between about 1 to about 30 minutes, for example, about 1 to about 20 minutes, or more than 1 minute, more than 5 minutes, more than 7 minutes, more than 10 minutes, more than 12 minutes, more than 15 minutes, more than 20 minutes, more than 30 minutes, about 30 minutes, or less than 30 minutes, less than 20 minutes, less than 15 minutes, less than 12 minutes, less than 10 minutes, less than 7 minutes, less than 5 minutes, or less than 1 minute. Sublingual dispersion rates may be shorter than buccal dispersion rates.

For instance, in some embodiments, the films may include polyethylene oxide alone or in combination with a second polymer component. The second polymer may be another watersoluble polymer, a water-swellable polymer, a water-insoluble polymer, a biodegradable polymer or any combination thereof. Suitable water-soluble polymers include, without limitation, any of those provided above. In some embodiments, the water-soluble polymer may include hydrophilic cellulosic polymers, such as hydroxypropyl cellulose and/or hydroxypropylmethyl cellulose. In some embodiments, one or more water-swellable, waterinsoluble and/or biodegradable polymers also may be included in the polyethylene oxide-based

film. Any of the water-swellable, water-insoluble or biodegradable polymers provided above may be employed. The second polymer component may be employed in amounts of about 0% to about 80% by weight in the polymer component, more specifically about 30% to about 70% by weight, and even more specifically about 40% to about 60% by weight, including greater than 5%, greater than 10%, greater than 15%, greater than 20%, greater than 30%, greater than 40%, greater than 50%, greater than 60%, and greater than 70%, about 70%, less than 70%, less than 60%, less than 50%, less than 40%, less than 30%, less than 20%, less than 10% or less than 5% by weight.

Additives may be included in the films. Examples of classes of additives include preservatives, antimicrobials, excipients, lubricants, buffering agents, stabilizers, blowing agents, pigments, coloring agents, fillers, bulking agents, sweetening agents, flavoring agents, fragrances, release modifiers, adjuvants, plasticizers, flow accelerators, mold release agents, polyols, granulating agents, diluents, binders, buffers, absorbents, glidants, adhesives, antiadherents, acidulants, softeners, resins, demulcents, solvents, surfactants, emulsifiers, elastomers, anti-tacking agents, anti-static agents and mixtures thereof. These additives may be added with the pharmaceutically active component(s).

As used herein, the term “stabilizer” means an excipient capable of preventing aggregation or other physical degradation, as well as chemical degradation, of the active pharmaceutical ingredient, another excipient, or the combination thereof.

Stabilizers may also be classified as antioxidants, sequestrants, pH modifiers, emulsifiers and/or surfactants, and UV stabilizers as discussed above and in more detail below.

Antioxidants (i.e., pharmaceutically compatible compound(s) or composition(s) that decelerates, inhibits, interrupts and/or stops oxidation processes) include, in particular, the following substances: tocopherols and the esters thereof, sesamol of sesame oil, coniferyl benzoate of benzoin resin, nordihydroguaietic resin and nor dihydroguaiaretic acid (NDGA), gallates (among others, methyl, ethyl, propyl, amyl, butyl, lauryl gallates), butylated hydroxyanisole (BHA/BHT, also butyl-p-cresol); ascorbic acid and salts and esters thereof (for example, acorbyl palmitate), erythorbinic acid (isoascorbinic acid) and salts and esters thereof, monothioglycerol, sodium formaldehyde sulfoxylate, sodium metabisulfite, sodium bisulfite, sodium sulfite, potassium metabisulfite, butylated hydroxy anisole, butylated hydroxytoluene (BHT), propionic acid. Typical antioxidants are tocopherol such as, for example, a-tocopherol

and the esters thereof, butylated hydroxytoluene and butylated hydroxyanisole. The terms tocopherol also includes esters of tocopherol. A known tocopherol is a-tocopherol. The term “a-tocopherol” includes esters of a-tocopherol (for example, a-tocopherol acetate).

Sequestrants (i.e., any compounds which can engage in host-guest complex formation with another compound, such as the active ingredient or another excipient; also referred to as a sequestering agent) include calcium chloride, calcium disodium ethylene diamine tetra-acetate, glucono delta-lactone, sodium gluconate, potassium gluconate, sodium tripolyphosphate, sodium hexametaphosphate, and combinations thereof. Sequestrants also include cyclic oligosaccharides, such as cyclodextrins, cyclomannins (5 or more a-D-mannopyranose units linked at the 1,4 positions by a linkages), cyclogalactins (5 or more β-D-galactopyranose units linked at the 1,4 positions by β linkages), cycloaltrins (5 or more a-D-altropyranose units linked at the 1,4 positions by a linkages), and combinations thereof.

pH modifiers include acids (e.g., tartaric acid, citric acid, lactic acid, fumaric acid, phosphoric acid, ascorbic acid, acetic acid, succininc acid, adipic acid and maleic acid), acidic amino acids (e.g., glutamic acid, aspartic acid, etc.), inorganic salts (alkali metal salt, alkaline earth metal salt, ammonium salt, etc.) of such acidic substances, a salt of such acidic substance with an organic base (e.g., basic amino acid such as lysine, arginine and the like, meglumine and the like), and a solvate (e.g., hydrate) thereof. Other examples of pH modifiers include silicified microcrystalline cellulose, magnesium aluminometasilicate, calcium salts of phosphoric acid (e.g., calcium hydrogen phosphate anhydrous or hydrate, calcium, sodium or potassium carbonate or hydrogencarbonate and calcium lactate or mixtures thereof), sodium and/or calcium salts of carboxymethyl cellulose, cross-linked carboxymethylcellulose (e.g., croscarmellose sodium and/or calcium), polacrilin potassium, sodium and or/calcium alginate, docusate sodium, magnesium calcium, aluminium or zinc stearate, magnesium palmitate and magnesium oleate, sodium stearyl fumarate, and combinations thereof.

Examples of emulsifiers and/or surfactants include poloxamers or pluronics, polyethylene glycols, polyethylene glycol monostearate, polysorbates, sodium lauryl sulfate, polyethoxylated and hydrogenated castor oil, alkyl polyoside, a grafted water soluble protein on a hydrophobic backbone, lecithin, glyceryl monostearate, glyceryl monostearate/polyoxyethylene stearate, ketostearyl alcohol/sodium lauryl sulfate, carbomer, phospholipids, (C!0-C20)־alkyl and alkylene carboxylates, alkyl ether carboxylates, fatty alcohol sulfates, fatty alcohol ether sulfates,

alkylamide sulfates and sulfonates, fatty acid alkylamide polyglycol ether sulfates, alkanesulfonates and hydroxyalkanesulfonates, olefinsulfonates, acyl esters of isethionates, asulfo fatty acid esters, alkylbenzenesulfonates, alkylphenol glycol ether sulfonates, sulfosuccinates, sulfosuccinic monoesters and diesters, fatty alcohol ether phosphates, protein/fatty acid condensation products, alkyl monoglyceride sulfates and sulfonates, alkylglyceride ether sulfonates, fatty acid methyltaurides, fatty acid sarcosinates, sulforicinoleates, and acylglutamates, quaternary ammonium salts (e.g., di-(C10־C24)-alkyldimethylammonium chloride or bromide), (C10-C24)-alkyl-dimethylethylammonium chloride or bromide, (C10-C24)-alkyl-trimethylammonium chloride or bromide (e.g., cetyltrimethylammonium chloride or bromide), (C10-C24)-alkyl-dimethylbenzylammonium chloride or bromide (e.g., (C!2—C18)-alkyl-dimethylbenzylammonium chloride), N—(C10-C18)alkyl-pyridinium chloride or bromide (e.g., N—(C12-C16)-alkyl-pyridinium chloride or bromide), N—(C10-C18)-alkyl-isoquinolinium chloride, bromide or monoalkyl sulfate, N—(C12-C18)-alkylpolyoylaminoformylmethylpyridinium chloride, N—(C12-C18)-alkyl-N-methylmorpholinium chloride, bromide or monoalkyl sulfate, N—(C12-C18)-alkyl-N-ethylmorpholinium chloride, bromide or monoalkyl sulfate, (C16-C18)-alkyl-pentaoxethylammonium chloride, diisobutylphenoxyethoxyethyldimethylbenzylammonium chloride, salts of N,N-diethylaminoethylstearylamide and -oleylamide with hydrochloric acid, acetic acid, lactic acid, citric acid, phosphoric acid, N-acylaminoethyl-N,N-diethyl-N-methylammonium chloride, bromide or monoalkyl sulfate, and N-acylaminoethyl-N,N-diethyl-N-benzylammonium chloride, bromide or monoalkyl sulfate (in the foregoing, “acyl” standing for, e.g., stearyl or oleyl), and combinations thereof.

Examples of UV stabilizers include UV absorbers (e.g., benzophenones), UV quenchers (i.e., any compound that dissipates UV energy as heat, rather than allowing the energy to have a degradation effect), scavengers (i.e., any compound that eliminates free radicals resulting from exposure to UV radiation), and combinations thereof.

In other embodiments, stabilizers include ascorbyl palmitate, ascorbic acid, alpha tocopherol, butylated hydroxytoluene, buthylated hydroxyanisole, cysteine HC1, citric acid, ethylenediamine tetra acetic acid (EDTA), methionine, sodium citrate, sodium ascorbate, sodium thiosulfate, sodium metabi sulfite, sodium bisulfite, propyl gallate, glutathione, thioglycerol, singlet oxygen quenchers, hydroxyl radical scavengers, hydroperoxide removing agents,

reducing agents, metal chelators, detergents, chaotropes, and combinations thereof. “Singlet oxygen quenchers” include, but are not limited to, alkyl imidazoles (e.g., histidine, L-camosine, histamine, imidazole 4-acetic acid), indoles (e.g., tryptophan and derivatives thereof, such as Nacetyl methoxytryptamine, N-acetylserotonin, 6-methoxy-l,2,3,4-tetrahydro-beta-carboline), sulfur-containing amino acids (e.g., methionine, ethionine, djenkolic acid, lanthionine, N-formyl methionine, felinine, S-allyl cysteine, S-aminoethyl-L-cysteine), phenolic compounds (e.g., tyrosine and derivatives thereof), aromatic acids (e.g., ascorbate, salicylic acid, and derivatives thereof), azide (e.g., sodium azide), tocopherol and related vitamin E derivatives, and carotene and related vitamin A derivatives. “Hydroxyl radical scavengers” include, but are not limited to azide, dimethyl sulfoxide, histidine, mannitol, sucrose, glucose, salicylate, and L-cysteine. “Hydroperoxide removing agents” include, but are not limited to catalase, pyruvate, glutathione, and glutathione peroxidases. “Reducing agents” include, but are not limited to, cysteine and mercaptoethylene. “Metal chelators” include, but are not limited to, EDTA, EGTA, 0phenanthroline, and citrate. “Detergents” include, but are not limited to, SDS and sodium lauroyl sarcosyl. “Chaotropes” include, but are not limited to guandinium hydrochloride, isothiocyanate, urea, and formamide. As discussed herein, stabilizers can be present in 0.0001%-50% by weight, including greater than 0.0001%, greater than 0.001%, greater than 0.01%, greater than 0.1%, greater than 1%, greater than 5%, greater than 10%, greater than 20%, greater than 30%, greater than 40%, greater than 50%, less than 50%, less than 40%, less than 30%, less than 20%, less than 10%, less than 1%, less than 0.1%, less than 0.01%, less than 0.001%, or less than 0.0001% by weight.

Useful additives can include, for example, gelatin, vegetable proteins such as sunflower protein, soybean proteins, cotton seed proteins, peanut proteins, grape seed proteins, whey proteins, whey protein isolates, blood proteins, egg proteins, acrylated proteins, water-soluble polysaccharides such as alginates, carrageenans, guar gum, agar-agar, xanthan gum, gellan gum, gum arabic and related gums (gum ghatti, gum karaya, gum tragancanth), pectin, water-soluble derivatives of cellulose: alkylcelluloses hydroxyalkylcelluloses and hydroxyalkylalkylcelluloses, such as methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropyl cellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, hydroxybutylmethylcellulose, cellulose esters and hydroxyalkylcellulose esters such as cellulose acetate phthalate (CAP), hydroxypropylmethylcellulose (HPMC); carboxyalkylcelluloses,

carboxyalkylalkylcelluloses, carboxyalkylcellulose esters such as carboxymethylcellulose and their alkali metal salts; water-soluble synthetic polymers such as polyacrylic acids and polyacrylic acid esters, polymethacrylic acids and polymethacrylic acid esters, polyvinyl acetates, polyvinylalcohols, polyvinylacetatephthalates (PVAP), polyvinylpyrrolidone (PVP), PVA/vinyl acetate copolymer, or polycrotonic acids; also suitable are phthalated gelatin, gelatin succinate, crosslinked gelatin, shellac, water-soluble chemical derivatives of starch, cationically modified acrylates and methacrylates possessing, for example, a tertiary or quaternary amino group, such as the diethylaminoethyl group, which may be quatemized if desired; or other similar polymers.

The additional components can range up to about 80%, desirably about 0.005% to 50% and more desirably within the range of 1% to 20% based on the weight of all composition components, including greater than 1%, greater than 5%, greater than 10%, greater than 20%, greater than 30%, greater than 40%, greater than 50%, greater than 60%, greater than 70%, about 80%, greater than 80%, less than 80%, less than 70%, less than 60%, less than 50%, less than 40%, less than 30%, less than 20%, less than 10%, less than 5%, about 3%, or less than 1%. Other additives can include anti-tacking, flow agents and opacifiers, such as the oxides of magnesium aluminum, silicon, titanium, etc., desirably in a concentration range of about 0.005% to about 5% by weight and desirably about 0.02% to about 2% based on the weight of all film components, including greater than 0.02%, greater than 0.2%, greater than 0.5%, greater than 1%, greater than 1.5%, greater than 2%, greater than 4%, about 5%, greater than 5%, less than 4%, less than 2%, less than 1%, less than 0.5%, less than 0.2%, or less than 0.02%.

In certain embodiments, the composition can include plasticizers, which can include polyalkylene oxides, such as polyethylene glycols, polypropylene glycols, polyethylenepropylene glycols, organic plasticizers with low molecular weights, such as glycerol, glycerol monoacetate, diacetate or triacetate, triacetin, polysorbate, cetyl alcohol, propylene glycol, sugar alcohols sorbitol, sodium diethylsulfosuccinate, triethyl citrate, tributyl citrate, phytoextracts, fatty acid esters, fatty acids, oils and the like, added in concentrations ranging from about 0.1% to about 40%, and desirably ranging from about 0.5% to about 20% based on the weight of the composition including greater than 0.5%, greater than 1%, greater than 1.5%, greater than 2%, greater than 4%, greater than 5%, greater than 10%, greater than 15%, about 20%, greater than 20%, less than 20%, less than 15%, less than 10%, less than 5%, less than 4%, less than 2%, less than 1%, or less than 0.5%. There may further be added compounds to improve the texture

properties of the film material such as animal or vegetable fats, desirably in their hydrogenated form. The composition can also include compounds to improve the textural properties of the product. Other ingredients can include binders which contribute to the ease of formation and general quality of the films. Non-limiting examples of binders include starches, natural gums, pregelatinized starches, gelatin, polyvinylpyrrolidone, methylcellulose, sodium carboxymethylcellulose, ethylcellulose, polyacrylamides, polyvinyloxoazolidone, or polyvinylalcohols.

Further potential additives include solubility enhancing agents, such as substances that form inclusion compounds with active components. Such agents may be useful in improving the properties of very insoluble and/or unstable actives. In general, these substances are doughnutshaped molecules with hydrophobic internal cavities and hydrophilic exteriors. Insoluble and/or instable pharmaceutically active components may fit within the hydrophobic cavity, thereby producing an inclusion complex, which is soluble in water. Accordingly, the formation of the inclusion complex permits very insoluble and/or unstable pharmaceutically active components to be dissolved in water. A particularly desirable example of such agents are cyclodextrins, which are cyclic carbohydrates derived from starch. Other similar substances, however, are considered well within the scope of the present invention.

Suitable coloring agents include food, drug and cosmetic colors (FD&C), drug and cosmetic colors (D&C), or external drug and cosmetic colors (Ext. D&C). These colors are dyes, their corresponding lakes, and certain natural and derived colorants. Lakes are dyes absorbed on aluminum hydroxide. Other examples of coloring agents include known azo dyes, organic or inorganic pigments, or coloring agents of natural origin. Inorganic pigments are preferred, such as the oxides or iron or titanium, these oxides, being added in concentrations ranging from about 0.001 to about 10%, and preferably about 0.5 to about 3%, including greater than 0.001%, greater than 0.01%, greater than 0.1%, greater than 0.5%, greater than 1%, greater than 2%, greater than 5%, about 10%, greater than 10%, less than 10%, less than 5%, less than 2%, less than 1%, less than 0.5%, less than 0.1%, less than 0.01%, or less than 0.001%, based on the weight of all the components.

Flavors may be chosen from natural and synthetic flavoring liquids. An illustrative list of such agents includes volatile oils, synthetic flavor oils, flavoring aromatics, oils, liquids, oleoresins or extracts derived from plants, leaves, flowers, fruits, stems and combinations

thereof. A non-limiting representative list of examples includes mint oils, cocoa, and citrus oils such as lemon, orange, lime and grapefruit and fruit essences including apple, pear, peach, grape, strawberry, raspberry, cherry, plum, pineapple, apricot or other fruit flavors. Other useful flavorings include aldehydes and esters such as benzaldehyde (cherry, almond), citral i.e., alphacitral (lemon, lime), neral, i.e., beta-citral (lemon, lime), decanal (orange, lemon), aldehyde C-8 (citrus fruits), aldehyde C-9 (citrus fruits), aldehyde C-12 (citrus fruits), tolyl aldehyde (cherry, almond), 2,6-dimethyloctanol (green fruit), or 2-dodecenal (citrus, mandarin), combinations thereof and the like.

The sweeteners may be chosen from the following non-limiting list: glucose (com syrup), dextrose, invert sugar, fructose, and combinations thereof, saccharin and its various salts such as the sodium salt; dipeptide based sweeteners such as aspartame, neotame, advantame; dihydrochalcone compounds, glycyrrhizin; Stevia Rebaudiana (Stevioside); chloro derivatives of sucrose such as sucralose; sugar alcohols such as sorbitol, mannitol, xylitol, and the like. Also contemplated are hydrogenated starch hydrolysates and the synthetic sweetener 3,6-dihydro-6methyl-l-l-l,2,3-oxathiazin one-2,2-dioxide, particularly the potassium salt (acesulfame-K), and sodium and calcium salts thereof, and natural intensive sweeteners, such as Lo Han Kuo. Other sweeteners may also be used.

Anti-foaming and/or de-foaming components may also be used with the films. These components aid in the removal of air, such as entrapped air, from the film-forming compositions. Such entrapped air may lead to non-uniform films. Simethicone is one particularly useful antifoaming and/or de-foaming agent. The present invention, however, is not so limited and other suitable anti-foam and/or de-foaming agents may be used. Simethicone and related agents may be employed for densification purposes. More specifically, such agents may facilitate the removal of voids, air, moisture, and similar undesired components, thereby providing denser and thus more uniform films. Agents or components which perform this function can be referred to as densification or densifying agents. As described above, entrapped air or undesired components may lead to non-uniform films.

Any other optional components described in commonly assigned U.S. Patent No. 7,425,292 and U.S. Patent No. 8,765,167, referred to above, also may be included in the films described herein.

The film compositions further desirably contains a buffer so as to control the pH of the film composition. Any desired level of buffer may be incorporated into the film composition so as to provide the desired pH level encountered as the pharmaceutically active component is released from the composition. The buffer is preferably provided in an amount sufficient to control the release from the film and/or the absorption into the body of the pharmaceutically active component. In some embodiments, the buffer may include sodium citrate, citric acid, bitartrate salt and combinations thereof.

The pharmaceutical films described herein may be formed via any desired process. Suitable processes are set forth in U.S. Patent Nos. 8,652,378, 7,425,292 and 7,357,891, which are incorporated by reference herein. In one embodiment, the film dosage composition is formed by first preparing a wet composition, the wet composition including a polymeric carrier matrix and a therapeutically effective amount of a pharmaceutically active component. The wet composition is cast into a film and then sufficiently dried to form a self-supporting film composition. The wet composition may be cast into individual dosages, or it may be cast into a sheet, where the sheet is then cut into individual dosages.

The pharmaceutical composition can adhere to a mucosal surface. The present invention finds particular use in the localized treatment of body tissues, diseases, or wounds which may have moist surfaces and which are susceptible to bodily fluids, such as the mouth, the vagina, organs, or other types of mucosal surfaces. The composition carries a pharmaceutical, and upon application and adherence to the mucosal surface, offers a layer of protection and delivers the pharmaceutical to the treatment site, the surrounding tissues, and other bodily fluids. The composition provides an appropriate residence time for effective drug delivery at the treatment site, given the control of erosion in aqueous solution or bodily fluids such as saliva, and the slow, natural erosion of the film concomitant or subsequent to the delivery.

The residence time of the composition depends on the erosion rate of the water erodable polymers used in the formulation and their respective concentrations. The erosion rate may be adjusted, for example, by mixing together components with different solubility characteristics or chemically different polymers, such as hydroxyethyl cellulose and hydroxypropyl cellulose; by using different molecular weight grades of the same polymer, such as mixing low and medium molecular weight hydroxyethyl cellulose; by using excipients or plasticizers of various lipophilic values or water solubility characteristics (including essentially insoluble components); by using

water soluble organic and inorganic salts; by using crosslinking agents such as glyoxal with polymers such as hydroxyethyl cellulose for partial crosslinking; or by post-treatment irradiation or curing, which may alter the physical state of the film, including its crystallinity or phase transition, once obtained. These strategies might be employed alone or in combination in order to modify the erosion kinetics of the film. Upon application, the pharmaceutical composition film adheres to the mucosal surface and is held in place. Water absorption softens the composition, thereby diminishing the foreign body sensation. As the composition rests on the mucosal surface, delivery of the drug occurs. Residence times may be adjusted over a wide range depending upon the desired timing of the delivery of the chosen pharmaceutical and the desired lifespan of the carrier. Generally, however, the residence time is modulated between about a few seconds to about a few days. Preferably, the residence time for most pharmaceuticals is adjusted from about 5 seconds to about 24 hours. More preferably, the residence time is adjusted from about 5 seconds to about 30 minutes. In addition to providing drug delivery, once the composition adheres to the mucosal surface, it also provides protection to the treatment site, acting as an erodable bandage. Lipophilic agents can be designed to slow down erodability to decrease disintegration and dissolution.

It is also possible to adjust the kinetics of erodability of the composition by adding excipients which are sensitive to enzymes such as amylase, very soluble in water such as water soluble organic and inorganic salts. Suitable excipients may include the sodium and potassium salts of chloride, carbonate, bicarbonate, citrate, trifluoroacetate, benzoate, phosphate, fluoride, sulfate, or tartrate. The amount added can vary depending upon how much the erosion kinetics is to be altered as well as the amount and nature of the other components in the composition.

Emulsifiers typically used in the water-based emulsions described above are, preferably, either obtained in situ if selected from the linoleic, palmitic, myristoleic, lauric, stearic, cetoleic or oleic acids and sodium or potassium hydroxide, or selected from the laurate, palmitate, stearate, or oleate esters of sorbitol and sorbitol anhydrides, polyoxyethylene derivatives including monooleate, monostearate, monopalmitate, monolaurate, fatty alcohols, alkyl phenols, allyl ethers, alkyl aryl ethers, sorbitan monostearate, sorbitan monooleate and/or sorbitan monopalmitate.

The amount of pharmaceutically active component to be used depends on the desired treatment strength and the composition of the layers, although preferably, the pharmaceutical

component comprises from about 0.001% to about 99%, more preferably from about 0.003 to about 75%, and most preferably from about 0.005% to about 50% by weight of the composition, including, more than 0.005%, more than 0.05%, more than 0.5%, more than 1%, more than 5%, more than 10%, more than 15%, more than 20%, more than 30%, about 50%, more than 50%, less than 50%, less than 30%, less than 20%, less than 15%, less than 10%, less than 5%, less than 1%, less than 0.5%, less than 0.05%, or less than 0.005%. The amounts of other components may vary depending on the drug or other components but typically these components comprise no more than 50%, preferably no more than 30%, and most preferably no more than 15% by total weight of the composition.

The thickness of the film may vary, depending on the thickness of each of the layers and the number of layers. As stated above, both the thickness and amount of layers may be adjusted in order to vary the erosion kinetics. Preferably, if the composition has only two layers, the thickness ranges from 0.005 mm to 2 mm, preferably from 0.01 to 1 mm, and more preferably from 0.1 to 0.5 mm, including greater than 0.1 mm, greater than 0.2 mm, about 0.5 mm, greater than 0.5 mm, less than 0.5 mm, less than 0.2 mm, or less than 0.1 mm. The thickness of each layer may vary from 10 to 90% of the overall thickness of the layered composition, and preferably varies from 30 to 60%, including greater than 10%, greater than 20%, greater than 30%, greater than 40%, greater than 50%, greater than 70%, greater than 90%, about 90%, less than 90%, less than 70%, less than 50%, less than 40%, less than 30%, less than 20%, or less than 10%. Thus, the preferred thickness of each layer may vary from 0.01 mm to 0.9 mm, or from 0.03 mm to 0.5 mm.

As one skilled in the art will appreciate, when systemic delivery, e.g., transmucosal or transdermal delivery is desired, the treatment site may include any area in which the film is capable of delivery and/or maintaining a desired level of pharmaceutical in the blood, lymph, or other bodily fluid. Typically, such treatment sites include the oral, esophageal, aural, ocular, anal, nasal, and vaginal mucosal tissue, as well as, the skin. If the skin is to be employed as the treatment site, then usually larger areas of the skin wherein movement will not disrupt the adhesion of the film, such as the upper arm or thigh, are preferred.

The pharmaceutical composition can also be used as a wound dressing. By offering a physical, compatible, oxygen and moisture permeable, flexible barrier which can be washed away, the film can not only protect a wound but also deliver a pharmaceutical in order to

promote healing, aseptic, scarification, to ease the pain or to improve globally the condition of the sufferer. Some of the examples given below are well suited for an application to the skin or a wound. As one skilled in the art will appreciate, the formulation might require incorporating a specific hydrophilic/hygroscopic excipient which would help in maintaining good adhesion on dry skin over an extended period of time. Another advantage of the present invention when utilized in this manner is that if one does not wish that the film be noticeable on the skin, then no dyes or colored substances need be used. If, on the other hand, one desires that the film be noticeable, a dye or colored substance may be employed.

While the pharmaceutical composition can adhere to mucosal tissues, which are wet tissues by nature, it can also be used on other surfaces such as skin or wounds. The pharmaceutical film can adhere to the skin if prior to application the skin is wet with an aqueousbased fluid such as water, saliva, wound drainage or perspiration. The film can adhere to the skin until it erodes due to contact with water by, for example, rinsing, showering, bathing or washing. The film may also be readily removed by peeling without significant damage to tissue.

A Franz diffusion cell is an in vitro skin permeation assay used in formulation development. The Franz diffusion cell apparatus (Figure 1A) consists of two chambers separated by a membrane of, for example, animal or human tissue. The test product is applied to the membrane via the top chamber. The bottom chamber contains fluid from which samples are taken at regular intervals for analysis to determine the amount of active that has permeated the membrane. Referring to Figure 1A, a Franz diffusion cell 100 includes a donor compound 101, a donor chamber 102, a membrane 103, sampling port 104, receptor chamber 105, stir bar 106, and a heater/circulator 107.

Referring to Figure IB, a pharmaceutical composition is a film 100 comprising a polymeric matrix 200, the pharmaceutically active component 300 being contained in the polymeric matrix. The film can include a permeation enhancer 400.

Referring to Figures 2A and 2B, the graphs show the permeation of an active material from a composition. The graph shows that for the Epinephrine Base - solubilized in-situ vs. the inherently soluble Epinephrine Bitartrate, no meaningful differences were observed. Epinephrine Bitartrate was selected for further development based on ease of processing. Flux is derived as slope of the amount permeated as a function of time. Steady state flux is taken from

the plateau of flux vs time curve multiplied by the volume of receiver media and normalized for permeation area.

Referring to Figure 2A, this graph shows average amount of active material permeated vs. time, with 8.00 mg/mL epinephrine bitartrate and 4.4 mg/mL epinephrine base solubilized.

Referring to Figure 2B, this graph shows average flux vs. time, with 8.00 mg/mL epinephrine bitartrate and 4.4 mg/mL epinephrine base solubilized.

Referring to Figure 3, this graph shows ex-vivo permeation of epinephrine bitartrate as a function of concentration. The study compared concentrations of 4 mg/mL, 8 mg/mL, 16 mg/mL and 100 mg/mL. Results showed that increasing concentration resulted in increased permeation, and level of enhancement diminishes at higher loading.

Referring to Figure 4, this graph shows permeation of epinephrine bitartrate as a function of solution pH. Acidic conditions explored to promote stability. The results compared Epinephrine Bitartrate pH 3 buffer and Epinephrine Bitartrate pH 5 buffer, and found that the Epinephrine Bitartrate pH 5 buffer was slightly favorable.

Referring to Figure 5, this graph shows the influence of enhancers on permeation of epinephrine, indicated as amount permeated as a function of time. Multiple enhancers were screened, including Labrasol, capryol 90, Plurol Oleique, Labrafil, TDM, SGDC, Gelucire 44/14 and clove oil. Significant impact on time to onset and steady state flux was achieved, and surprisingly enhanced permeation was achieved for clove oil and Labrasol.

Referring to Figure 6A and 6B, these graphs show the release of epinephrine on polymer platforms and the effect of enhancers on its release, indicated as amount permeated (in pg) vs. time. Figure 6A shows the epinephrine release from different polymer platforms. Figure 6B shows the impact of enhancers on epinephrine release.

Referring to Figure 7, this graph shows a pharmacokinetic model in the male Yucatan, miniature swine. The study compares a 0.3 mg Epipen, a 0.12 mg Epinephrine IV and a placebo film.

Referring to Figure 8, this graphs shows the impact of no enhancer on the concentration profiles of a 40 mg Epinephrine film vs, a 0.3 mg Epipen.

Referring to Figure 9, this graph shows the impact of Enhancer A (Labrasol) on the concentration profiles of a 40 mg Epinephrine film vs, a 0.3 mg Epipen. Referring to Figure

10, this graph shows the impact of Enhancer L (clove oil) on the concentration profiles of two 40 mg Epinephrine films (10 1) and (11 1) vs. a 0.3 mg Epipen.

Referring to Figure 11, This graph shows the impact of Enhancer L(clove oil) and film dimension (10 1 thinner bigger film and 11 1 thicker smaller film) on the concentration profiles of 40 mg Epinephrine films vs. a 0.3 mg Epipen.

Referring to Figure 12, this graph shows the concentration profiles for varying doses of Epinephrine films in a constant matrix for Enhancer L (clove oil) vs. a 0.3 mg Epipen.

Referring to Figure 13, the graph shows the concentration profiles for varying doses of Epinephrine films in a constant matrix for Enhancer L (clove oil) vs. a 0.3 mg Epipen.

Referring to Figure 14, the graph shows the concentration profiles for varying doses of Epinephrine films in a constant matrix for Enhancer A (Labrasol) vs. a 0.3 mg Epipen.

Referring to Figure 15, this graph shows the influence of enhancers on permeation of diazepam, indicated as amount permeated as a function of time.

Referring to Figure 16, this graph shows the average flux as a function of time (diazepam + enhancers).

Referring to Figure 17, this graph shows the impact of Farnesol and Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

Referring to Figure 18, this graph shows the impact of Farnesol and Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

Referring to Figure 19, this graph shows the impact of Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

Referring to Figure 20, this graph shows the impact of Farnesol and Farnesol in combination with Linoleic Acid on plasma concentration profiles of 40 mg Epinephrine Films vs. a 0.3 mg Epipen.

The following examples are provided to illustrate pharmaceutical compositions, as well as, methods of making and using, pharmaceutical compositions and devices described herein.

EXAMPLES

Example 1 Permeation Enhancers - Epinephrine

Permeation enhancement was studied using a number of permeation enhancers with

Epinephrine Bitartrate 16.00 mg/mL concentration. The results show flux enhancement represented in the data below. For 100% Eugenol and 100% Clove Oil, the results showed steady state flux reached significantly earlier along with an unexpectedly heightened % flux enhancement.

<td> Donor Solution (16.00mg/mL Epinephrine Bitartrate + enhancer)</td><td> Average Steady State Flux (ug/cm2*min)</td><td> % Flux enhancement</td><td> Permeability Coefficient (cm/s)</td>

<td> Epinephrine Bitartrate ,no enhancer</td><td> 1.3173</td><td> N/A</td><td> 1.37E-06</td>

<td> 3% Clove Oil</td><td> 8.2704</td><td> 527.84</td><td> 8.61E-06</td>

<td> 3% Clove Oil Repeat</td><td> 5.3776</td><td> 308.24</td><td> 5.60E-06</td>

<td> 3% Eugenol</td><td> 7.1311</td><td> 441.35</td><td> 7.43E-06</td>

<td> 3% Eugenyl Acetate</td><td> 1.8945</td><td> 43.82</td><td> 1.97E-06</td>

<td> 3% B-Caryophyllene</td><td> 3.5200</td><td> 167.22</td><td> 3.67E-06</td>

<td> 0.3% Eugenol*</td><td> 3.9735</td><td> 201.65</td><td> 4.14E-06</td>

<td> 100% Eugenol ¹</td><td> 36.8432</td><td> 2696.92</td><td> 3.84E-05</td>

<td> 0.3% Clove Oil*</td><td> 3.6806</td><td> 179.41</td><td> 3.83E-06</td>

<td> 100% Clove Oil ¹</td><td> 52.5304</td><td> 3887.81</td><td> 5.47E-05</td>

<td> 3% Phenol</td><td> 4.5790</td><td> 247.61</td><td> 4.77E-06</td>

<td> 3% Phenol Repeat</td><td> 4.1753</td><td> 216.97</td><td> 4.35E-06</td>

<td> 3% Linoleic Acid</td><td> 2.1788</td><td> 65.40</td><td> 2.27E-06</td>

<td> 50%Clove Oil</td><td> 2.5673</td><td> 94.89</td><td> 2.67E-06</td>

<td> 0.3% Labrasol</td><td> 3.5221</td><td> 167.38</td><td> 3.67E-06</td>

<td> 3% Vanillyl Alcohol+ 6% Ethanol</td><td> 1.10243</td><td>.31</td><td> 1.15E-06</td>

<td> 3% Safrole</td><td> 2.60634</td><td> 97.86</td><td> 2.71E-06</td>

<td> 3% Oleic Acid</td><td> 2.06597</td><td> 56.84</td><td> 2.15E-06</td>

<td> 3% Oleic Acid + 1% PEG200</td><td> 2.73655</td><td> 107.74</td><td> 2.85E-06</td>

<td> 3% Benzyl Alcohol</td><td> 1.38455</td><td> 5.11</td><td> 1.44E-06</td>

1 steady state flux reached at much earlier time point * 0.3% Eugenol vs 0.3% Clove -similar flux rates to one another

For these examples, clove oil was obtained from clove leaf. Similar results may be obtained from clove oil from clove bud and/or clove stem. Based on this data, similar permeability enhancement results can be expected from pharmaceutical compounds structurally similar to epinephrine.

Example 2 Diazepam Solubility and Permeability

Diazepam was applied in the buccal area (cheek) to diffuse through the oral mucosa and enter directly into the bloodstream. Solubility of diazepam was also studied using various excipients. Figure 15 shows the influence of enhancers on permeation of diazepam, indicated as 10 amount permeated indicated as ug as a function of time. Figure 16 shows the average flux indicated as pg/cm* min, as a function of time in minutes in a solution of diazepam and certain selected enhancers.

The following excipients have also been studied to improve solubility.

<td> EXCIPIENTS</td><td> HLB</td><td> Water Solubility</td><td> Melting Point °C</td><td> API Solubility mg/gm total mix</td>

<td> RD-0073-10 SERIES</td><td></td><td></td><td></td><td></td>

<td> PEG 400</td><td></td><td> S</td><td> Liquid</td><td> 90</td>

<td> Caprylic/Capric Triglyceride</td><td></td><td> I</td><td> Liquid</td><td> &lt; 50</td>

<td> Propylene Glycol</td><td></td><td> s</td><td> Liquid</td><td> &lt;30</td>

<td> Glycerol Monooleate</td><td> 1</td><td> I</td><td> 24</td><td> 71</td>

<td> Polysorbate 80</td><td> 15</td><td> s</td><td> Liquid</td><td> 83</td>

<td> PEG 4000</td><td></td><td> s</td><td> 53-59</td><td> 125</td>

<td> PEG 32 Glyceryl Palmitostearate</td><td> 11</td><td> D</td><td> 50</td><td> 125</td>

<td> Mix: PEG 400, PEG 4000, PEO N80</td><td></td><td> s</td><td></td><td> 118</td>

<td> Poloxamer 407</td><td> 18 to 23</td><td> s</td><td> 52-57</td><td> 110-140</td>

<td> Polyoxyl 50 Stearate</td><td> 11 to 12</td><td> s</td><td> 30-35</td><td> 200</td>

<td></td><td></td><td></td><td></td><td></td>

<td> RD-0073-19 series</td><td></td><td></td><td></td><td></td>

<td> Benzyl Alcohol</td><td></td><td> s</td><td> Liquid</td><td> 400</td>

<td> Polyoxyl 40 Hyd Castor Oil</td><td> 14 to 16</td><td> s</td><td> 16-26</td><td> 167</td>

<td> Poloxamer 124</td><td> 12 to 18</td><td> s</td><td> 16</td><td> 127</td>

<td></td><td></td><td></td><td></td><td></td>

<td> RD-0073-20 series</td><td></td><td></td><td></td><td></td>

<td> Clove Oil</td><td></td><td> I</td><td> Liquid</td><td> 394</td>

<td> Castor Oil</td><td></td><td> I</td><td> Liquid</td><td> &lt;50</td>

<td> Light Mineral Oil</td><td></td><td> I</td><td> Liquid</td><td> &lt;50</td>

<td> Oleic Acid</td><td></td><td> I</td><td> Liquid</td><td> &lt;50</td>

<td> Polyoxyl 40 Stearate</td><td> 17</td><td> s</td><td> 38</td><td> 83</td>

<td> Mai sine 35-1 (GMLinO)</td><td> 1</td><td> I</td><td> Liquid</td><td> 45</td>

<td> Labrasol Caprylocaproyl polyoxyl-8 glycerides</td><td> 12</td><td> D</td><td> Liquid</td><td> 83</td>

<td></td><td></td><td></td><td></td><td></td>

<td> RD-0073-27 series</td><td></td><td></td><td></td><td></td>

<td> Soybean Oil</td><td></td><td> I</td><td> Liquid</td><td> &lt;50</td>

<td></td><td></td><td></td><td></td><td></td>

<td> RD-0073-38 series</td><td></td><td></td><td></td><td></td>

<td> Clove Oil FCC</td><td></td><td> I</td><td> Liquid</td><td> 370</td>

The following excipients can also be applied for similar enhancement properties: cinnamon leaf, basil, bay leaf, nutmeg, Kolliphor® TPGS, Vit E PEG Succinate, Kolliphor® EL, Polyoxyl 35 Castor Oil USP/NF, Menthol, N-Methyl pyrrolidone, SLS (SDS), SDBS, Dimethyl Phthalate, Sucrose Palmitate (Sistema PS750-C), Sucrose Stearate (Sistema SP70-C), CHAPS, Octyl glucoside, Triton X 100 (Octoxynol-9), Ethyl Maltol (flavorant powder), Brij 58 (Ceteth-20), Vitamin E tocopherol, tocopherol acetate or tocopherol succinate, sterols, phytoextracts, essential oils or Cod Liver Oil.

The following results were obtained in a solution of Diazepam having a concentration of 8.00 mg/mL.

<td> Donor Solution (8.00mg/mL Diazepam + enhancer)</td><td> Average Steady State Flux (ug/cm2*min)</td><td> Permeability Coefficient (cm/s)</td>

<td> 100% Clove Oil</td><td> 0.0008</td><td> 1.63E-09</td>

<td> 100% Benzyl Alcohol</td><td> 0.0058</td><td> 1.22E-08</td>

<td> 3% Eugenyl Acetate</td><td rowspan="2"> 0.1037 0.0798</td><td> 2.16E-07</td>

<td> 3% β-Caryophyllene</td><td> 1.66E-07</td>

<td> 3% Phenol</td><td> 0.2752</td><td> 5.73E-07</td>

<td> 3% Cinnamaldehyde</td><td> 0.1306</td><td> 2.72E-07</td>

<td> 3% Clove Oil</td><td> 0.0990</td><td> 2.06E-07</td>

<td> 3% Benzyl Alcohol</td><td> 0.1438</td><td> 3.00E-07</td>

<td> 3% Labrasol</td><td> 0.1251</td><td> 2.61E-07</td>

<td> 100% Cinnamaldehyde</td><td> 0.0057</td><td> 1.19E-08</td>

Example 3 General Permeation Procedure - Ex vivo Permeation Study Protocol

In one example, a permeation procedure is conducted as follows. A temperature bath is set to 37° C, and receiver media is placed in a water bath to adjust the temperature and begin degassing. A franz diffusion cell is obtained and prepared. The Franz diffusion cell includes a donor compound, a donor chamber, a membrane, sampling port, receptor chamber, stir bar, and a heater/circulator. A stir bar is inserted into a franz diffusion cell. Tissue is placed over the franz diffusion cell, and it is ensured that the tissue covers the entire area with an overlap onto a glass joint. The top of a diffusion cell is placed over the tissue, and the top of the cell is clamped to the bottom. About 5 mL of receptor media is loaded into the receiver area to ensure that no air

bubbles are trapped in the received portion of the cell. This ensures that all 5mL can fit into the receiver area. Stirring is begun, and temperature is allowed to equilibrate for about 20 minutes. Meanwhile, High Performance Liquid Chromatography (HPLC) vials are labelled by cell number and time point. One must then check again for air bubbles as the solution will degas during heating.

If testing films, one can perform the following next steps: (1) weigh films, punch to match diffusion area (or smaller), reweigh, record pre- and post-punching weight; (2) wet a donor area with approximately 100 pL of phosphate buffer; (3) place film on a donor surface, top with 400 pL of phosphate buffer, and start timers.

For solution studies, one can perform the following steps: (1) using a micropipette, dispense 500 pL of the solution into each donor cell, start the timers; (2) sample 200 pL at the following time points (time = 0 min, 20 min, 40 min, 60 min, 120 min, 180 min, 240 min, 300 min, 360 min), and place in labelled HPLC vials, ensure no air is trapped in the bottom of the vial by tapping the closed vials; (3) replace each sample time with 200 uL of receptor media (to maintain 5 mL); (4) When all time points completed, disassemble the cells and dispose of all materials properly.

Example 4 Ex vivo Permeation Evaluation

An exemplary ex vivo permeation evaluation is as follows.

1. Tissue is freshly excised and shipped (e.g. overnight) at 4° C.

2. The tissue is processed and frozen at -20° C for up to three weeks prior to use.

3. The tissue is dermatomed to precise thickness.

4. Approximately 5 mL of receiving media is added to the receiving compartment. The media is selected to ensure sink conditions.

5. The tissue is placed in a franz diffusion cell, which includes a donor compound, a donor chamber, a membrane, sampling port, receptor chamber, stir bar, and a heater/circulator.

6. Approximately 0.5 mL of donor solution is applied or 8 mm circular film and wetted with 500 pL PBS buffer.

7. Samples are taken from the receiving chamber at given intervals and replaced with fresh media.

Example 5 Transbuccal delivery of doxepin

The following is an exemplary permeation study on the transbuccal delivery of doxepin. The studies were conducted under a protocol approved by the Animal Experimentation Ethics Committee of the University of Barcelona (Spain) and the Committee of Animal Experimentation of the regional autonomous government of Catalonia (Spain). Female pigs 3-4months-old were used. The porcine buccal mucosa from the cheek region was excised immediately after the pigs were sacrificed in the animal facility at Bellvitge Campus (University of Barcelona, Spain) using an overdose of sodium thiopental anesthesia. The fresh buccal tissues were transferred from the hospital to the laboratory in containers filled with Hank’s solution. The remaining tissue specimens were stored at -80° C in containers with a PBS mixture containing 4% albumin and 10% DMSO as cryoprotective agents.

For the permeation studies, the porcine buccal mucosa was cut to 500 +/- 50 pm thick sheets, which contributes to the diffusional barrier (Buccal bioadhesive drug delivery — A promising option for orally less efficient drugs Sudhakar et al., Journal of Controlled Release 114 (2006) 15-40), using an electric dermatome (GA 630, Aesculap, Tuttlingen, Germany) and trimmed with surgical scissors in adequate pieces. The majority of the underlying connective tissue was removed with a scalpel.

Membranes were then mounted in specially designed membrane holders with a permeation orifice diameter of 9 mm (diffusion area 0.636 cm2). Using the membrane holder, each porcine buccal membrane was mounted between the donor (1.5 mL) and the receptor (6 mL) compartments with the epithelium side facing the donor chamber and the connective tissue region facing the receiver of static Franz-type diffusion cells (Vidra Foe Barcelona, Spain) avoiding bubbles formation.

Infinite dose conditions were ensured by applying 100 pL as donor solution of a saturated doxepin solution into the receptor chamber and sealed by Parafilmimmediately to prevent water evaporation. Prior to conducting the experiments, the diffusion cells were incubated for 1 h in a water bath to equalize the temperature in all cells (37° +/- ° C). Each cell contained a small

Teflon 1 coated magnetic stir bar which was used to ensure that the fluid in the receptor compartment remained homogenous during the experiments.

Sink conditions were ensured in all experiments by initial testing of doxepin saturation concentration in the receptor medium. Samples (300 pL) were drawn via syringe from the center of the receptor compartment at pre-selected time intervals (0.1, 0.2, 0.3, 0.7, 1, 2, 3, 4, 5 and 6 h) for 6 h. The removed sample volume was immediately replaced with the same volume of fresh receptor medium (PBS; pH 7.4) with great care to avoid trapping air beneath the membrane. Additional details can be found in A. Gimemo, et al. Transbuccal delivery of doxepin: Studies on permeation and histological evaluation, International Journal of Pharmaceutics All (2014), 650-654, which is incorporated by reference herein.

Example 6

Oral transmucosal delivery

Porcine oral mucosal tissue has similar histological characteristics to human oral mucosal tissue (Heaney TG, Jones RS, Histological investigation of the influence of adult porcine alveolar mucosal connective tissues on epithelial differentiation. Arch Oral Biol 23 (1978) 713717; Squier CA, and Collins P, The relationship between soft tissue attachment, epithelial downgrowth and surface porosity. Journal of Periodontal Research 16 (1981) 434-440). Lesch et al. (The Permeability of Human Oral Mucosa and Skin to Water, J Dent Res 68 (9), 1345-1349, 1989) reported that the water permeability of porcine buccal mucosa was not significantly different from human buccal mucosa but the floor of the mouth was more permeable in human tissue than in pig tissue. Comparisons between fresh porcine tissue specimens and those stored at -80° C revealed no significant effect on permeability as a result of freezing. Porcine buccal mucosal absorption has been studied for a wide range of drug molecules both in vitro and in vivo (see, e.g., Table 1 of M. Sattar, Oral transmucosal drug delivery - current status and future prospects, International Journal of Pharmaceutics 471 (2014) 498-506), which is incorporated by reference herein. Typically, in vitro studies involve mounting excised porcine buccal tissue in Ussing chambers, Franz cells or similar diffusion apparatus. The in vivo studies described in the literature involve the application of the drug as a solution, gel or composition to the buccal mucosa of pigs followed by plasma sampling.

Nicolazzo et al. (The Effect of Various in Vitro Conditions on the Permeability Characteristics of the Buccal Mucosa, Journal of Pharmaceutical Sciences 92(12) (2002) 23992410) investigated the effects of various in vitro conditions on the permeability of porcine buccal

tissue using caffeine and oestradiol as model hydrophilic and lipophilic molecules. Drug permeation in the buccal mucosa was studied using modified Ussing chambers. Comparative permeation studies were performed through full thickness and epithelial tissues, fresh and frozen tissues. Tissue integrity was monitored by the absorption of the fluorescein isothiocyanate (FITC)-labeled dextran 20 kDa (FD20) and tissue viability was assessed using an MTT (3-[4,5dimethylthiazol yl]-2,5-diphenyltetrazolium bromide) biochemical assay and histological evaluation. Permeability through the buccal epithelium was 1.8-fold greater for caffeine and 16.7-fold greater for oestradiol compared with full thickness buccal tissue. Flux values for both compounds were comparable for fresh and frozen buccal epithelium although histological evaluation demonstrated signs of cellular death in frozen tissue. The tissue appeared to remain viable for up to 12 h postmortem using the MTT viability assay which was also confirmed by histological evaluation.

Kulkarni et al. investigated the relative contributions of the epithelium and connective tissue to the barrier properties of porcine buccal tissue. In vitro permeation studies were conducted with antipyrine, buspirone, bupivacaine and caffeine as model permeants. The permeability of the model diffusants across buccal mucosa with thickness of 250, 400, 500, 600, and 700 pm was determined. A bilayer membrane model was developed to delineate the relative contribution to the barrier function of the epithelium and the connective tissue. The relative contribution of the connective tissue region as a permeability barrier significantly increased with increasing mucosal tissue thickness. A mucosal tissue thickness of approximately 500 pm was recommended by the authors for in vitro transbuccal permeation studies as the epithelium represented the major permeability barrier for all diffusants at this thickness. The authors also investigated the effects of a number of biological and experimental variables on the permeability of the same group of model permeants in porcine buccal mucosa (Porcine buccal mucosa as in vitro model: effect of biological and experimental variables, Kulkarni et al., JPharm Sci. 2010 99(3):1265-77). Significantly, higher permeability of the permeants was observed for the thinner region behind the lip (170-220 pm) compared with the thicker cheek (250-280 pm) region. Porcine buccal mucosa retained its integrity in Kreb’s bicarbonate ringer solution at 4°C for 24 h. Heat treatment to separate the epithelium from underlying connective tissue did not adversely affect its permeability and integrity characteristics compared with surgical separation.

Additional details can be found at M. Sattar, Oral transmucosal drug delivery - current status and future prospects, International Journal of Pharmaceutics 471 (2014) 498-506, which is incorporated by reference herein.

Example 7

Cryopreservation of buccal mucosa

Different areas of porcine buccal mucosa have different pattern of permeability, there is significantly higher permeability in the region behind the lips in comparison to cheek region, because in porcine buccal mucosa, the epithelium acts as a permeability barrier, and the thickness of the cheek epithelium is greater than that of the region behind the lips (Harris and Robinson, 1992). In exemplary permeation studies, the fresh or frozen porcine buccal mucosa from the same area was cut to 500 ± 50 pm thick sheets, which contributes to the diffusional barrier (Sudhakar et al., 2006), were obtained using an electric dermatome (model GA 630, Aesculap, Tuttlingen, Germany) and trimmed with surgical scissors in adequate pieces. All devices utilized were previously sterilized. The majority of the underlying connective tissue was removed with a scalpel. Membranes were then mounted in specially designed membrane holders with a permeation orifice diameter of 9 mm (diffusion area 0.63 cm2). Using the membrane holder, each porcine buccal membrane was mounted between the donor (1.5 mL) and the receptor (6 mL) compartments with the epithelium facing the donor chamber and the connective tissue region facing the receiver of static Franz-type diffusion cells (Vidra Foe, Barcelona, Spain) avoiding bubbles formation. Experiments were performed using PP, which has lipophilic characteristics (logP = 1.16; n-octanol/PBS, pH 7.4), ionisable (pKa = 9.50) and a MW= 259.3 g/mol, as a model drug (Modamio et al., 2000).

Infinite dose conditions were ensured by applying 300 pL as a donor solution of a saturated solution of PP (CO = 588005 ± 5852 pg/mL at 37° ± 1°C, n = 6), in PBS (pH 7.4) into the receptor chamber and sealed by Parafilm immediately to prevent water evaporation.

Prior to conducting the experiments, the diffusion cells were incubated for 1 h in a water bath to equilibrate the temperature in all cells (37° ± 1 C). Each cell contained a small Teflon coated magnetic stir bar which was used to ensure that the fluid in the receptor compartment remained homogenous during the experiments. Sink conditions were ensured in all experiments after initial testing of PP saturation concentration in the receptor medium.

Samples (300 pL) were drawn via syringe from the center of the receptor compartment at the following time intervals: 0.25, 0.5, 1, 2, 3, 4, 5 and 6 h. The removed sample volume was

immediately replaced with the same volume of fresh receptor medium (PBS; pH 7.4) with great care to avoid trapping air beneath the dermis. Cumulative amounts of the drug (pg) penetrating the unit surface area of the mucosa membrane (cm2) were corrected for sample removal and plotted versus time (h). The diffusion experiments were carried out 27 times for the fresh and 22 times for the frozen buccal mucosa.

Additional details can be found at S. Amores, An improved cryopreservation method for porcine buccal mucosa in ex vivo drug permeation studies using Franz diffusion cells, European Journal of Pharmaceutical Sciences 60 (2014) 49-54.

Example 8

Permeation of quinine across sublingual mucosa sections

Since porcine and human oral membranes are similar in composition, structure and permeability measurements, porcine oral mucosa is a suitable model for human oral mucosa. Permeability across the porcine oral mucosa is not metabolically linked therefore it is not important for the tissue to be viable.

To prepare the porcine membranes, porcine floor of mouth and ventral (underside) tongue mucosa membranes were excised by blunt dissection using a scalpel. The excised mucosa were cut into approximately 1 cm squares and frozen on aluminium foil at -20°C until used (&lt;2 weeks). For non-frozen ventral surface of porcine tongue, the mucosa was used in the permeation studies within 3 h of excision.

The permeability of the membranes to quinine was determined using all-glass Franz diffusion cells with a nominal receptor volume of 3.6 mL and diffusional area of 0.2 cm2. The cell flanges were greased with high performance vacuum grease and the membranes mounted between the receptor and donor compartments, with the mucosal surface uppermost. Clamps were used to hold the membranes into position before the receptor compartments were filled with degassed phosphate buffered saline (PBS), pH 7.4. Micromagnetic stirrer bars were added to the receptor compartments and the complete cells were placed in a water bath at 37°C. The membranes were equilibrated with PBS applied to the donor compartments for 20 min before being aspirated with a pipette. Aliquots of 5pL of the quinine solution or 100 pL of the saturated solutions of Q/2-HP-3&amp;#1470;CD complex in different vehicles were applied to each of the donor compartments. In the study to determine the effect of saliva on the permeation of quinine across the ventral surface of the tongue, 100 pL of sterile saliva was added to the donor compartments before adding 5 pL of the quinine solution.

At 2, 4, 6, 8, 10 and 12 h, the receptor phases were withdrawn from the sampling ports and aliquots of 1 mL samples were transferred to HPLC autosampler vials, before being replaced with fresh PBS stored at 37°C. Apart from the studies involving Q/2-HP&amp;#1470;3&amp;#1470;CD saturated solutions (where an infinite dose was applied at the start of the experiments), 5 pL of the respective quinine solution was reapplied to the donor phase up to 10 h. The purpose of this was to represent a hypothetical in-use finite dosing regimen based upon an interval of 2 h between doses. At least 3 replicates were carried out for each study.

Additional details can be found at C. Ong, Permeation of quinine across sublingual mucosa, in vitro, International Journal of Pharmaceutics 366 (2009) 58-64.

Example 9

Ex-Vivo Initial Study - Form of the API

In this example, the permeation of Epinephrine Base was tested - solubilized in situ vs. the inherently soluble Epinephrine Bitartrate and no differences were found. Epinephrine Bitartrate was selected for further development based on ease of processing. Flux was derived as slope of the amount permeated as a function of time. Steady state flux extrapolated from the plateau of flux vs time curve multiplied by the volume of receiver media. The graph in Figure 2A shows average amount permeated vs. time, with 8.00 mg/mL Epinephrine bitartrate and 4.4 mg/mL Epinephrine base solubilized. The graph in Figure 2B shows average flux vs. time, with 8.00 mg/mL Epinephrine bitartrate and 4.4 mg/mL Epinephrine base solubilized.

<td> Donor Solution</td><td> Average Steady State Flux (ug/cm2*min)</td>

<td> Epinephrine Base (cone 4.4mg/mL)</td><td> 0.512</td>

<td> Epinephrine Bitartrate (cone S.OOmg/nnL)</td><td> O. 466</td>

Example 10 Concentration dependence on permeation/flux

In this study, ex-vivo permeation of Epinephrine Bitartrate as a function of concentration was studied. Figure 3 shows ex-vivo permeation of epinephrine bitartrate as a function of concentration. The study compared concentrations of 4 mg/mL, 8 mg/mL, 16 mg/mL and 100 mg/mL. Results showed that increasing concentration resulted in increased permeation, and level of enhancement diminishes at higher loading. The study compared concentrations of 4 mg/mL, 8 mg/mL, 16 mg/mL and 100 mg/mL.

<td> Donor Solution</td><td> Average Steady State Flux (ug/cm2*min)</td>

<td> Epinephrine Bitartrate (cone 4mg/mL)</td><td> 0.167</td>

<td> Epinephrine Bitartrate (cone Smg/mL)</td><td> 0.466</td>

<td> Epinephrine Bitartrate (cone 16mg/mL)*</td><td> 1.317</td>

<td> Epinephrine Bitartrate (cone lOOmg/mL)</td><td> 2.942</td>

<td> Donor Solution</td><td> Ratio of enhancement</td><td> Theoretical enhancement</td>

<td> Epinephrine Bitartrate (4.OOmg/mL)</td><td> N/A</td><td> N/A</td>

<td> Epinephrine Bitartrate (8.00mg/mL)</td><td> 2.8</td><td> 2</td>

<td> Epinephrine Bitartrate (16.00mg/rnL)</td><td> 7.9</td><td> 4</td>

<td> Epinephrine Bitartrate (100.00mg/mL)</td><td> 17.6</td><td> 25</td>

Example 11 Influence of pH

In this example, the permeation of Epinephrine Bitartrate as a function of solution pH was studied. In this example, acidic conditions were explored for the ability to promote stability. The results showed that pH 5 was slightly more favorable as compared to pH 3. The inherent pH of epinephrine bitartrate in solution in the concentration ranges explored is 4.5-5. No pH adjustment with buffers was required.

Figure 4 shows permeation of epinephrine bitartrate as a function of solution pH. Acidic conditions were explored to promote stability. The results compared Epinephrine Bitartrate pH 3 buffer and Epinephrine Bitartrate pH 5 buffer, and found that the Epinephrine Bitartrate pH 5 buffer was slightly favorable.

Example 12

Influence of enhancers on permeation of epinephrine

In this example, the permeation of epinephrine to test for transmucosal delivery was studied as the amount permeated (pg) vs. time (in minutes). The following enhancers were screened for concentration effects in a solution containing 16.00 mg/mL Epinephrine. The graph on Figure 5 demonstrates the results of these enhancers as a function of time.

<td> Legend</td><td> Enhancer</td><td> Average Steady State Flux (pg/cm2*min)</td><td> Percent Enhancement</td>

<td> No Enhancer</td><td> None</td><td> 1.317</td><td> N/A</td>

<td> Enhancer A</td><td> 3% Labrasol Caprylocaproyl polyoxyl-8 glycerides</td><td> 5.208</td><td> 395</td>

<td> Enhancer B</td><td> 3% Propylene glycol monocaprylate</td><td> 2.385</td><td> 181</td>

<td> Enhancer C</td><td> 3% Polyglyceryl-3 oleate</td><td> 1.482</td><td> 112</td>

<td> Enhancer D</td><td> 3% Oleoyl polyoxyl-6 glycerides</td><td> 0.281</td><td> 21</td>

<td> Enhancer E</td><td> 3% TDM</td><td> 2.642</td><td> 201</td>

<td> Enhancer F</td><td> 3% SGDC</td><td> 0.342</td><td> 26</td>

<td> Enhancer G</td><td> 3% Lauroyl polyoxyl-32 glycerides</td><td> 1.641</td><td> 125</td>

<td> Enhancer H</td><td> 3% Ethanol</td><td> 0.163</td><td> 12</td>

<td> Enhancer I</td><td> 6% Ethanol</td><td> 0.254</td><td> 19</td>

<td> Enhancer J</td><td> 6% Labrasol Caprylocaproyl polyoxyl-8 glycerides</td><td> 4.444</td><td> 337</td>

<td> Enhancer K</td><td> 6% Polyglyceryl-3 oleate</td><td> 0.306</td><td> 23</td>

<td> Enhancer L</td><td> 3% clove oil</td><td> 8.216</td><td> 624</td>

Enhancers were selected and designed with functionality influencing different barriers in 5 the mucosa. While all tested enhancers did improve the amout permeated over time, clove oil and Labrasol, in particular have shown significantly and unexpectedly high enhancement of permeation.

8.00mg/0.500mL

40mg/ strip no enhancer

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/cm2*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 30</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 45</td><td> 2.5</td><td> 4.33012702</td><td> 0.260416667</td><td> 0.4510549</td><td> 1.317274</td>

<td> 60</td><td> 5.5</td><td> 7.08872344</td><td> 0.3125</td><td> 0.3125</td><td></td>

<td> 120</td><td> 31.33333333</td><td> 26.1549868</td><td> 0.672743056</td><td> 0.5050226</td><td></td>

<td> 180</td><td> 72.66666667</td><td> 58.215834</td><td> 1.076388889</td><td> 0.8496863</td><td></td>

<td> 240</td><td> 112.1666667</td><td> 80.1878004</td><td> 1.028645833</td><td> 0.5733604</td><td></td>

<td> 300</td><td> 160.1666667</td><td> 103.254943</td><td> 1.25</td><td> 0.6036108</td><td></td>

<td> 360</td><td> 213.3333333</td><td> 131.305306</td><td> 1.384548611</td><td> 0.7308311</td><td></td>

8.00mg/0.500mL

40mg/ strip

Labrasol

<td> Time (min)</td><td> set 1 (A,B,C) average amount permeated (ug)</td><td> std dev set 1 amount perm</td><td> set 1 (A, B,C) average flux (pg/cm2*min)</td><td> std dev set 1</td><td> steady state flux average</td>

<td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 30</td><td> 0.5</td><td> 0.8660254</td><td> 0.026041667</td><td> 0.0451055</td><td> 5.208333</td>

<td> 45</td><td> 2.666666667</td><td> 0.28867513</td><td> 0.225694444</td><td> 0.0601407</td><td></td>

<td> 60</td><td> 4</td><td> 1.80277564</td><td> 0.138888889</td><td> 0.1674245</td><td></td>

<td> 120</td><td> 28</td><td> 16.3935963</td><td> 0.625</td><td> 0.3836177</td><td></td>

<td> 180</td><td> 98</td><td> 53.3291665</td><td> 1.822916667</td><td> 0.9701176</td><td></td>

<td> 240</td><td> 238.1666667</td><td> 93.0017921</td><td> 3.650173611</td><td> 1.136722</td><td></td>

<td> 300</td><td> 421.1666667</td><td> 115.153521</td><td> 4.765625</td><td> 0.6675003</td><td></td>

<td> 360</td><td> 638.1666667</td><td> 130.709921</td><td> 5.651041667</td><td> 0.4732495</td><td></td>

8.00mg/0.500mL

40mg/strip capryol 90

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 30</td><td> 0.00</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 45</td><td> 0.00</td><td> 0</td><td> 0</td><td> 0</td><td> 1.931424</td>

<td> 60</td><td> 0.00</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 120</td><td> 9.17</td><td> 5.79511288</td><td> 0.238715278</td><td> 0.1509144</td><td></td>

<td> 180</td><td> 38.67</td><td> 16.7655401</td><td> 0.768229167</td><td> 0.2864583</td><td></td>

<td> 240</td><td> 88.50</td><td> 30.2654919</td><td> 1.297743056</td><td> 0.4018216</td><td></td>

<td> 300</td><td> 150.67</td><td> 39.6936183</td><td> 1.618923611</td><td> 0.3269068</td><td></td>

<td> 360</td><td> 236.83</td><td> 51.9358579</td><td> 2.243923611</td><td> 0.4999616</td><td></td>

8.00mg/0.500mL

40mg/strip plurol oleique

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0.8</td><td> 1.78885438</td><td> 0</td><td> 0</td><td></td>

<td> 30</td><td> 10.80</td><td> 13.325727</td><td> 0.520833333</td><td> 0.7186273</td><td></td>

<td> 45</td><td> 20.90</td><td> 22.1624683</td><td> 1.052083333</td><td> 0.9356173</td><td> 1.481771</td>

<td> 60</td><td> 33.00</td><td> 30.8058436</td><td> 1.260416667</td><td> 0.9319861</td><td></td>

<td> 120</td><td> 90.70</td><td> 68.1951245</td><td> 1.502604167</td><td> 1.005753</td><td></td>

<td> 180</td><td> 157.00</td><td> 107.373763</td><td> 1.7265625</td><td> 1.0427891</td><td></td>

<td> 240</td><td> 239.80</td><td> 140.586539</td><td> 2.15625</td><td> 1.2085059</td><td></td>

<td> 300</td><td> 285.60</td><td> 184.236397</td><td> 1.192708333</td><td> 1.484335</td><td></td>

<td> 360</td><td> 353.60</td><td> 221.81676</td><td> 1.770833333</td><td> 0.993644</td><td></td>

8.00mg/0.500mL

40mg/strip

TDM

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0.00</td><td> 0.00</td><td> 0.00</td><td> 0.00</td><td></td>

<td> 20</td><td> 0.00</td><td> 0.00</td><td> 0.00</td><td> 0.00</td><td></td>

<td> 40</td><td> 3.00</td><td> 2.43</td><td> 0.23</td><td> 0.32</td><td> 2.642144</td>

<td> 60</td><td> 8.83</td><td> 4.86</td><td> 0.46</td><td> 0.35</td><td></td>

<td> 120</td><td> 41.33</td><td> 15.08</td><td> 0.85</td><td> 0.49</td><td></td>

<td> 180</td><td> 99.75</td><td> 30.17</td><td> 1.52</td><td> 0.79</td><td></td>

<td> 240</td><td> 179.92</td><td> 48.30</td><td> 2.09</td><td> 0.98</td><td></td>

<td> 300</td><td> 276.92</td><td> 72.35</td><td> 2.53</td><td> 1.19</td><td></td>

<td> 360</td><td> 382.83</td><td> 102.02</td><td> 2.76</td><td> 1.38</td><td></td>

8.00mg/0.500mL

40mg/strip

SGDC

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 30</td><td> 0.00</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 45</td><td> 0.67</td><td> 1.30384048</td><td> 0.069444444</td><td> 0.1261521</td><td> 0.341797</td>

<td> 60</td><td> 1.58</td><td> 1.94935887</td><td> 0.095486111</td><td> 0.1063147</td><td></td>

<td> 120</td><td> 7.00</td><td> 9.44325156</td><td> 0.141059028</td><td> 0.1910856</td><td></td>

<td> 180</td><td> 16.17</td><td> 22.0323626</td><td> 0.238715278</td><td> 0.316132</td><td></td>

<td> 240</td><td> 28.58</td><td> 37.6191441</td><td> 0.323350694</td><td> 0.3977149</td><td></td>

<td> 300</td><td> 43.00</td><td> 54.3927844</td><td> 0.375434028</td><td> 0.4112124</td><td></td>

<td> 360</td><td> 54.83</td><td> 65.7976063</td><td> 0.308159722</td><td> 0.3008536</td><td></td>

8.00mg/0.500mL

40mg/strip

Labrafil

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0.8</td><td> 1.15108644</td><td> 0</td><td> 0</td><td></td>

<td> 30</td><td> 1.10</td><td> 1.51657509</td><td> 0.015625</td><td> 0.0232924</td><td></td>

<td> 45</td><td> 1.10</td><td> 1.51657509</td><td> 0</td><td> 0</td><td> 0.28125</td>

<td> 60</td><td> 1.10</td><td> 1.51657509</td><td> 0</td><td> 0</td><td></td>

<td> 120</td><td> 4.00</td><td> 4.89897949</td><td> 0.075520833</td><td> 0.0984775</td><td></td>

<td> 180</td><td> 9.10</td><td> 10.9167303</td><td> 0.1328125</td><td> 0.1671035</td><td></td>

<td> 240</td><td> 15.20</td><td> 18.7169709</td><td> 0.158854167</td><td> 0.2034753</td><td></td>

<td> 300</td><td> 25.70</td><td> 29.8487856</td><td> 0.2734375</td><td> 0.2910091</td><td></td>

<td> 360</td><td> 36.80</td><td> 43.3093523</td><td> 0.2890625</td><td> 0.3532943</td><td></td>

8.00mg/0.500mL

40mg/strip

Gelucire 44/14

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 20</td><td> 0.33</td><td> 0.89442719</td><td> 0.026041667</td><td> 0.0637888</td><td></td>

<td> 40</td><td> 3.83</td><td> 5.94138031</td><td> 0.2734375</td><td> 0.378725</td><td> 1.629774</td>

<td> 60</td><td> 11.50</td><td> 17.1850225</td><td> 0.598958333</td><td> 0.8405853</td><td></td>

<td> 120</td><td> 41.58</td><td> 48.5059275</td><td> 0.783420139</td><td> 0.8042794</td><td></td>

<td> 180</td><td> 91.92</td><td> 82.5124233</td><td> 1.310763889</td><td> 0.9525224</td><td></td>

<td> 240</td><td> 150.17</td><td> 118.949569</td><td> 1.516927083</td><td> 0.9914576</td><td></td>

<td> 300</td><td> 217.50</td><td> 158.792947</td><td> 1.753472222</td><td> 1.0756081</td><td></td>

<td> 360</td><td> 275.33</td><td> 189.967563</td><td> 1.506076389</td><td> 0.9083155</td><td></td>

8.00mg/0.500mL

40mg/strip clove oil

<td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/cm2*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 20</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 40</td><td> 28.66666667</td><td> 27.360251</td><td> 2.239583333</td><td> 2.1375196</td><td> 8.270399</td>

<td> 60</td><td> 96.5</td><td> 79.5424415</td><td> 5.299479167</td><td> 4.0954816</td><td></td>

<td> 120</td><td> 389.6666667</td><td> 278.072533</td><td> 7.634548611</td><td> 5.2070528</td><td></td>

<td> 180</td><td> 688.6666667</td><td> 451.678628</td><td> 7.786458333</td><td> 4.5210426</td><td></td>

<td> 240</td><td> 1009.166667</td><td> 603.252089</td><td> 8.346354167</td><td> 3.9590828</td><td></td>

<td> 300</td><td> 1333.5</td><td> 759.653046</td><td> 8.446180556</td><td> 4.1168559</td><td></td>

<td> 360</td><td> 1644.333333</td><td> 878.2762</td><td> 8.094618056</td><td> 3.2301203</td><td></td>

<td rowspan="10"> 8.00mg/0.500mL 40mg/strip 3% Labrasol +1%TDM</td><td> Time (min)</td><td> set 2 (A,B,C) average amount permeated</td><td> std dev set 2 amount perm</td><td> set 2 (D,E,F) average flux (pg/mL*min)</td><td> std dev set 2</td><td> steady state flux average</td>

<td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td></td>

<td> 20</td><td> 0</td><td> 0</td><td> 0</td><td> 0</td><td> 3.161892</td>

<td> 40</td><td> 1.666666667</td><td> 2.88675135</td><td> 0.130208333</td><td> 0.2255274</td><td></td>

<td> 60</td><td> 6.833333333</td><td> 11.8356805</td><td> 0.403645833</td><td> 0.6991351</td><td></td>

<td> 120</td><td> 68.83333333</td><td> 92.6907942</td><td> 1.614583333</td><td> 2.1084505</td><td></td>

<td> 180</td><td> 103.6666667</td><td> 101.539812</td><td> 0.907118056</td><td> 0.3351021</td><td></td>

<td> 240</td><td> 180</td><td> 130.184484</td><td> 1.987847222</td><td> 0.7476876</td><td></td>

<td> 300</td><td> 291.5</td><td> 149.81572</td><td> 2.903645833</td><td> 0.5193664</td><td></td>

<td> 360</td><td> 422.8333333</td><td> 164.032263</td><td> 3.420138889</td><td> 0.5530917</td><td></td>

Example 13 Impact of enhancers on epinephrine release

Release profiles of epiphrine were studied to determine the impact of enhancers (Labrasol and clove oil) on epinephrine release. Figure 6A shows the epinephrine release from different polymer platforms. Figure 6B shows the impact of enhancers on epinephrine release. The results showed that the amount permeated leveled off after about 40 minutes to be between approximately 3250 and 4250 pg. The tested enhancers were shown not to restrict the release of 10 epinephrine from the matrix.

Example 14 Accelerated stability

The stabilizer loading variants were tested.

<td></td><td> Formulation 10</td><td> Formulation 10 with 0.25% Stabilizer</td><td> Formulation 10 with 1% Stabilizer</td>

<td> Time (weeks) @ 40°C/75% R.H.</td><td> EPI mg/film</td><td> EPI mg/film</td><td> EPI mg/film</td>

<td> 0</td><td> 39.3</td><td> 37.9</td><td> 38.3</td>

<td> 2</td><td> 35.2</td><td> 36.8</td><td> 34.7</td>

<td> 4</td><td> 38.2</td><td> 36.8</td><td> 36.2</td>

<td> 8</td><td> 37.7</td><td> 35.6</td><td> 35.1</td>

<td> 12</td><td> 36.1</td><td> 35.4</td><td> 35.1</td>

Example 15 Impact of Enhancer

A pharmacokinetic model in the male Yucatan, miniature swine was studied. The graph on Figure 7 shows the results of a pharmacokinetic model in the male Yucatan, miniature swine. The study compares a 0.3 mg Epipen, a 0.12 mg Epinephrine IV and a placebo.

The impact of no enhancer is shown in Figure 8 on the concentration profiles of a 0.3 mg Epipen and a 40 mg Epinephrine film with no enhancer.

The impact of enhancer 3% Labrasol is shown in Figure 9, which shows the impact of Enhancer A (Labrasol) on the concentration profiles of a 40 mg Epinephrine film vs. a 0.3 mg Epipen. Figure 10 shows the impact of Enhancer L (clove oil) on the concentration profiles of two 40 mg Epinephrine films (10 1) and (11 1) vs. a 0.3 mg Epipen.

In addition, the influence of film dimensions and impact of clove oil (3%) is also shown in Figure 11. This study was carried out comparing 0.30 mg EpiPen (n=4), a 40 mg Epinephrine Film (10 1) (n=5) and a 40 mg Epinephrine Film (11 1) (n=5). The concentration vs. time profiles followed subligual or intramuscular epinephrine administration to male miniature swine.

Studies were performed to vary the ratio of ephinephrine to an enhancer. These studies were also concentration vs. time profiles following subligual or intramuscular epinephrine administration to male miniature swine. Varying the ratio of Epinephrine to clove oil (Enhancer L) produced the results shown in Figure 12. This study was carried out comparing 0.30 mg EpiPen (n=4), a 40 mg Epinephrine Film (12 1) (n=5) and a 20 mg Epinephrine Film (13 1) (n=5).

Example 16

A varying dose was carried out in constant matrix with enhancer Labrasol (3%) and clove oil (3%) are shown in Figures 13 and 14 respectively. The study in Figure 13 was carried out comparing 0.30 mg EpiPen (n=4), a 40 mg Epinephrine Film (18 1) (n=5) and a 30 mg Epinephrine Film (20 1) (n=5). The study in Figure 14 was carried out comparing 0.30 mg EpiPen (n=4), a 40 mg Epinephrine Film (19 1) (n=5) and a 30 mg Epinephrine Film (21 1) (n=5). These studies were also concentration vs. time profiles following subligual or intramuscular epinephrine administration to male miniature swine.

Example 17

A pharmacokinetic model in the male miniature swine was studied to determine the impact of an enhancer (farnesol) on epinephrine concentration over time. The graph on Figure 17 shows the epinephrine plasma concentration (in ng/mL) as a function of time (in minutes) following sublingual or intramuscular administration of a farnesol permeation enhancer. This study compares a 0.3 mg Epipen (n=3), a 30 mg Epinephrine Film 31 1 (n=5) and a 30 mg Epinephrine Film 32 1 (n=5) each Epinephrine Film being formulated with a farnesol enhancer. As shown in this figure, the 31 1 film demonstrates enhanced stability of epinephrine concentration starting at about 30-40 minutes until approximately 130 minutes.

The graph in Figure 18 is taken from the same study as Figure 17, but shows exclusively the data points comparing the 0.3 mg Epipen against the 30 mg Epinephrine Film 31 1 (n=5).

The graph in Figure 19 is taken from the same study as Figure 17, but shows exclusively the data points comparing the 0.3 mg Epipen against the 30 mg Epinephrine Film 32 1 (n=5).

Example 18

Referring to Figure 20, this graph shows a pharmacokinetic model in the male miniature swine was studied to determine the impact of an enhancer (farnesol) on epinephrine

concentration over time following sublingual or intramuscular administration. The epinephrine plasma concentration (in ng/mL) is shown as a function of time (in minutes) following sublingual or intramuscular administration of a farnesol permeation enhancer in Epinephrine films. The study compared data from three 0.3 mg Epipens against five 30 mg Epinephrine films 5 (32 1). The data shows the Epinephrine films film having enhanced stability of epinephrine concentration starting at about 20-30 minutes until approximately 130 minutes.

Example 19

In one embodiment, an epinephrine pharmaceutical composition film can be made with the following formulation:

<td></td><td colspan="3"> Formulation A</td>

<td> MATERIAL</td><td> WT % dry</td><td> WT % wet</td><td> mg/Strip</td>

<td> EPINEPHRINE bitartrate</td><td> 46.40</td><td> 18.56</td><td> 54.56</td>

<td> Hydroxypropylmethyl cellulose</td><td> 11.54</td><td> 4.61</td><td> 13.57</td>

<td> Polyvinyl pyrrolidone</td><td> 27.92</td><td> 11.17</td><td> 32.84</td>

<td> Glycerol monooleate</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Polyethylene Oxide</td><td> 1.16</td><td> 0.46</td><td> 1.36</td>

<td> Polysorbate</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Phytoextract</td><td> 9.98</td><td> 3.99</td><td> 9.97</td>

<td> Stabilizer</td><td> 0.12</td><td> 0.05</td><td> 0.14</td>

<td> Buffer</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Artifical sweetener</td><td> 1.16</td><td> 0.46</td><td> 1.36</td>

<td> Linoleic acid</td><td> 0.0037</td><td> 0.00</td><td> 0.00</td>

<td> Farnesol</td><td></td><td></td><td></td>

<td> Yellow # 5</td><td></td><td></td><td></td>

<td> TOTAL</td><td> 100.00</td><td> 40.00</td><td> 115.84</td>

Example 20

An epinephrine pharmaceutical composition film was made with the following formulation:

<td></td><td colspan="3"> Formulation B</td>

<td> MATERIAL</td><td> WT % dry</td><td> WT % wet</td><td> mg/Strip</td>

<td> EPINEPHRINE bitartrate</td><td> 46.17</td><td> 18.47</td><td> 54.29</td>

<td> Hydroxypropylmethyl cellulose</td><td> 11.48</td><td> 4.59</td><td> 13.50</td>

<td> Polyvinyl pyrrolidone</td><td> 27.78</td><td> 11.11</td><td> 32.67</td>

<td> Glycerol monooleate</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Polyethylene Oxide</td><td> 1.15</td><td> 0.46</td><td> 1.35</td>

<td> Polysorbate</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Phytoextract</td><td> 9.93</td><td> 3.97</td><td> 9.92</td>

<td> Stabilizer</td><td> 0.12</td><td> 0.05</td><td> 0.14</td>

<td> Buffer</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Artifical sweetener</td><td> 1.15</td><td> 0.46</td><td> 1.35</td>

<td> Linoleic acid</td><td> 0.50</td><td> 0.20</td><td> 0.59</td>

<td> Farnesol</td><td></td><td></td><td></td>

<td> Yellow # 5</td><td></td><td></td><td></td>

<td> TOTAL</td><td> 100.00</td><td> 40.00</td><td> 115.85</td>

Example 21

In another embodiment, pharmaceutical film compositions were made with the following formulation:

<td></td><td colspan="3"> Formulation C</td>

<td> MATERIAL</td><td> WT % dry</td><td> WT % wet</td><td> mg/Strip</td>

<td> EPINEPHRINE bitartrate</td><td> 46.35</td><td> 18.54</td><td> 54.51</td>

<td> Hydroxypropylmethyl cellulose</td><td> 11.53</td><td> 4.61</td><td> 13.55</td>

<td> Polyvinyl pyrrolidone</td><td> 27.90</td><td> 11.16</td><td> 32.80</td>

<td> Glycerol monooleate</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Polyethylene oxide</td><td> 1.16</td><td> 0.46</td><td> 1.36</td>

<td> Polysorbate</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Phytoextract</td><td> 9.97</td><td> 3.99</td><td> 9.96</td>

<td> Stabilizer</td><td> 0.12</td><td> 0.05</td><td> 0.14</td>

<td> Buffer</td><td> 0.58</td><td> 0.23</td><td> 0.68</td>

<td> Artifical sweetener</td><td> 1.16</td><td> 0.46</td><td> 1.36</td>

<td> Linoleic acid</td><td></td><td></td><td></td>

<td> Farnesol</td><td> 0.10</td><td> 0.04</td><td> 0.06</td>

<td> Yellow # 5</td><td></td><td></td><td></td>

<td> TOTAL</td><td> 100.00</td><td> 40.00</td><td> 115.78</td>

Example 22

In another embodiment, pharmaceutical film compositions were made with the following formulation:

<td></td><td colspan="3"> Formulation D</td>

<td> MATERIAL</td><td> WT % dry</td><td> WT % wet</td><td> mg/Strip</td>

<td> EPINEPHRINE bitartrate</td><td> 46.07</td><td> 18.43</td><td> 54.52</td>

<td> Hydroxypropylmethyl cellulose</td><td> 11.46</td><td> 4.58</td><td> 13.56</td>

<td> Polyvinyl pyrrolidone</td><td> 27.73</td><td> 11.09</td><td> 32.81</td>

<td> Glycerol monooleate</td><td> 0.57</td><td> 0.23</td><td> 0.68</td>

<td> Polyethylene oxide</td><td> 1.15</td><td> 0.46</td><td> 1.36</td>

<td> Polysorbate</td><td> 0.57</td><td> 0.23</td><td> 0.68</td>

<td> Phytoextract</td><td> 9.91</td><td> 3.96</td><td> 9.96</td>

<td> Stabilizer</td><td> 0.11</td><td> 0.05</td><td> 0.14</td>

<td> Buffer</td><td> 0.57</td><td> 0.23</td><td> 0.68</td>

<td> Artificial sweetener</td><td> 1.15</td><td> 0.46</td><td> 1.36</td>

<td> Linoleic acid</td><td> 0.10</td><td> 0.04</td><td> 0.06</td>

<td> Farnesol</td><td> 0.50</td><td> 0.20</td><td> 0.29</td>

<td> Yellow # 5</td><td> 0.10</td><td> 0.04</td><td> 0.06</td>

<td> TOTAL</td><td> 100.00</td><td> 40.00</td><td> 116.16</td>

Example 23

Referring to Figure 21, this graph shows a pharmacokinetic model (logarithmic scale) in the male miniature swine studied to determine the impact of an enhancer (6% clove oil and 6% Labrasol) on epinephrine plasma concentration over time following sublingual or intramuscular administration. The epinephrine plasma concentration (in ng/mL) is shown as a function of time (in minutes) following sublingual or intramuscular administration of a farnesol permeation enhancer in Epinephrine films. The data shows the Epinephrine films film having enhanced stability of epinephrine concentration starting at just after the 10 minute time point through about 30 minutes, and until approximately 100 minutes.

Referring to Figure 22, this graph shows a pharmacokinetic model of the Epinephrine film formulation in the male miniature swine as referenced in Figure 21 compared against the average data collected from a 0.3 mg Epipen (indicated in diamond data points). As the data indicates, the average plasma concentration for the 0.3 mg Epipen peaked between 0.5 and 1 ng/mL. By contrast, the Epinephrine film formulation peaked between 4 and 4.5 ng/mL.

Example 24

Referring to Figure 23, this graph shows a pharmacokinetic model in the male miniature swine studied to determine the impact of an enhancer (9% clove + 3% Labrasol) on epinephrine concentration over time following sublingual or intramuscular administration across 7 animal models. The general peak concentration was achieved between 10-30 minutes.

Alprazolam Data

Example 25

Referring to Figure 24A, Figure 24B, and Figure 24B, these graphs represent data from a male miniature swine study comparing alprazolam plasma concentration over time (in hours) upon sublingual administration of oral alprazolam disintegrating tablet (ODT) and alprazolam pharmaceutical composition film.

Figure 24A shows mean data from alprazolam ODT (Group 1). Peak concentration of between 7-12 ng/mL was achieved at approximately 1-8 hours.

Figure 24B shows mean data from alprazolam pharmaceutical composition film (Group 2). Peak concentration of between 5-17 ng/mL, including greater than 5 ng/mL, greater than 10 ng/mL, greater than 12 ng/mL, greater than 15 ng/mL, greater than 17 ng/mL, less than 17

ng/mL, less than 15 ng/mL, less than 12 ng/mL, less than 10 ng/mL, less than 5 ng/mL, was achieved between between 10 minutes to 4 hours, including greater than 10 minutes, greater than 20 minutes, greater than 30 minutes, greater than 45 minutes, greater than 1 hour, greater than 1.5 hours, greater than 2 hours, greater than 2.5 hours, greater than 3 hours, greater than 3.5 hours, or about 4 hours, less than 4 hours, less than 3.5 hours, less than 3 hours, less than 2.5 hours, less than 2 hours, less than 1.5 hours, less than 1 hour, less than 45 minutes, less than 30 minutes, or less than 20 minutes.

Figure 24C shows mean data from alprazolam pharmaceutical composition film from another group of male miniature swine (Group 3). Peak concentration of between 5-17 ng/mL, including greater than 5 ng/mL, greater than 10 ng/mL, greater than 12 ng/mL, greater than 15 ng/mL, greater than 17 ng/mL, less than 17 ng/mL, less than 15 ng/mL, less than 12 ng/mL, less than 10 ng/mL, less than 5 ng/mL, was achieved between 10 minutes to 4 hours, including greater than 10 minutes, greater than 20 minutes, greater than 30 minutes, greater than 45 minutes, greater than 1 hour, greater than 1.5 hours, greater than 2 hours, greater than 2.5 hours, greater than 3 hours, greater than 3.5 hours, and about 4 hours, less than 4 hours, less than 3.5 hours, less than 3 hours, less than 2.5 hours, less than 2 hours, less than 1.5 hours, less than 1 hour, less than 45 minutes, less than 30 minutes, or less than 20 minutes.

Example 26

Referring to Figure 25 A, this graph illustrates data from a male miniature swine study comparing alprazolam plasma concentration over time following sublingual administration (in hours) of oral alprazolam disintegrating tablet (ODT) (indicated by circle data points) and two groups with alprazolam pharmaceutical composition film (indicated by square and triangle data points).

As the graph indicates, the data from the alprazolam pharmaceutical composition film (both groups) obtained a higher alprazolam plasma concentration of up to approximately 15-25 mg/mL in a therapeutic window of about 30 minutes or less, including more than 10 minutes, more than 20 minutes, about 30 minutes, more than 30 minutes, less than 30 minutes, less than 20 minutes less than 15 minutes, or less than 10 minutes.

Referring to Figure 25B, this graph indicates the individual data points from the studies referenced in Figure 25A.

Referring to Figure 25C, this graph indicates the individual data points from the studies referenced in Figure 25A from 0-1 hour.

Referring to Figure 26A, this graph indicates the individual alprazolam ODT referenced in Figure 25C.

Referring to Figure 26B, this graph indicates the individual alprazolam pharmaceutical film referenced in Figure 25C.

Referring to Figure 26C, this graph indicates the individual data points for the data points for the data points for the alprazolam pharmaceutical film (second group) referenced in Figure 25C.

The data from the graphs referenced above is also summarized in the following table:

<td> Pharmaceutical</td><td> Tmax (hrs)</td><td> Cmax (ng/mL)</td><td> AUC ng*hr/mL</td>

<td> Alprazolam 2 mg (ODT)</td><td> 4.25</td><td> 16.18 ±2.90</td><td> 120.61 ±29.63</td>

<td> Alprazolam 2 mg film 12-1-1</td><td> 0.5</td><td> 27± 6.0</td><td> 154.46 ±41.29</td>

<td> Alprazolam 2 mg Film 13-1-1</td><td> 1.5</td><td> 20.52± 11.01</td><td> 103.74 ±35.57</td>

<td> Alprazolam 2 mg Film 6-1-1</td><td> 2.5</td><td> 11.5 ± 4.7</td><td> 86.0 ±35.5</td>

<td> Alprazolam 2 mg Film 1-1-2</td><td> 1</td><td> 15.2 ± 5.7</td><td> 96.6 ±44.3</td>

Example 27

Referring to Figure 27A, this figure illustrates mean data from a male miniature swine study comparing alprazolam plasma concentration over time following sublingual administration of oral alprazolam disintegrating tablet (ODT) (indicated by circle data points) and two groups with alprazolam pharmaceutical composition film (indicated by square and triangle data points). As the data indicates, the 0.5 mg alprazolam ODT achieved a range of peak concentration of about 5-6 ng/mL between 0-4 hours, including greater than 10 minutes, greater than 20 minutes, greater than 30 minutes, greater than 45 minutes, greater than 1 hour, greater than 1.5 hours, greater than 2 hours, greater than 2.5 hours, greater than 3 hours, greater than 3.5 hours, or about 4 hours, less than 4 hours, less than 3.5 hours, less than 3 hours, less than 2.5 hours, less than 2 hours, less than 1.5 hours, less than 1 hour, less than 45 minutes, less than 30 minutes, or less

than 20 minutes. The 0.5 mg alprazolam pharmaceutical composition film achieved peak concentration of about 7-8 ng/mL and 6-7 ng/mL, respectively between 0-4 hours, including greater than 10 minutes, greater than 20 minutes, greater than 30 minutes, greater than 45 minutes, greater than 1 hour, greater than 1.5 hours, greater than 2 hours, greater than 2.5 hours, greater than 3 hours, greater than 3.5 hours, or about 4 hours, less than 4 hours, less than 3.5 hours, less than 3 hours, less than 2.5 hours, less than 2 hours, less than 1.5 hours, less than 1 hour, less than 45 minutes, less than 30 minutes, or less than 20 minutes.

Referring to Figure 27B, this graph illustrates mean data of alprazolam plasma concentration over time following sublingual administration of oral alprazolam disintegrating tablet (ODT) (indicated by circle data points) and two groups with alprazolam pharmaceutical composition film (indicated by square and triangle data points) between 0-2 hours. Unlike the ODT, the therapeutic window for the alprazolam pharmaceutical composition films started at 1015 minutes, whereas the ODT started at approximately 17-20 minutes.

Referring to Figure 27C, this graph illustrates complete data referenced in Fig. 27B, for ODT (n=4), 0.5 mg alprazolam pharmaceutical composition film 14 1 (n=5), and 0.5 mg alprazolam pharmaceutical composition film 15 1 (n=5).

The data from the graphs referenced above is also summarized in the following table:

<td> Pharmaceutical</td><td> Tmax (hrs)</td><td> Cmax (ng/mL)</td><td> AUC ng*hr/mL</td>

<td> Alprazolam 0.5 mg (ODT)</td><td> 1.5</td><td> 5.56± 1.41</td><td> 34.01±14.74</td>

<td> Alprazolam 0.5 mg film 14-1-1</td><td> 1</td><td> 10.87±3.08</td><td> 50.80±10.03</td>

<td> Alprazolam 0.5 mg Film 15-1-1</td><td> 2</td><td> 7.33±2.80</td><td> 37.31±10.09</td>

Example 28

In one investigation, the usability of diazepam buccal soluble film was studied as an oral treatment in adult patients with epilepsy. Diazepam buccal soluble film (DBSF) is an exemplary embodiment of the claimed subject matter. DBSF is novel dosage form of diazepam under development for the management of selected patients with refractory epilepsy who require intermittent use of diazepam to control episodes of increased seizure activity. DBSF has the potential to be the first orally administered treatment for this indication and would provide an

alternative to rectal diazepam gel. DBSF is administered by placing the film against the inner aspect of the cheek, where it adheres, dissolves and releases drug onto the buccal mucosa. The DBSF dosage form is expected to be accepted by a broad range of patients with epilepsy. A Phase 2 pharmacokinetic study in the epilepsy monitoring unit (EMU) assessed safety, pharmacokinetics and usability of DBSF.

A Phase 2, multi-center, open-label, crossover study in adult subjects were studied during two treatment visits separated by at least three weeks. The study enrolled male and female subjects 17-65 years of age with a clinical diagnosis of epilepsy (tonic clonic seizures or focal seizures with impaired awareness) who required EMU evaluation. Subjects received DBSF administered in 12.5 mg during the interictal state (Treatment A) and the ictal/periictal state (during or within 5 min of a seizure; Treatment B). Usability endpoints for investigator placement of DBSF included: (1) whether successful placement was achieved, (2) number of attempts needed to successfully insert the film, (3) whether the subject spit or blew out the film, and (4) whether or not DBSF was swallowed.

The results were as follows: A total of 35 subjects received at least one dose of DBSF. Of those subjects, 33 subjects had usability data collected during Treatment A and 33 subjects had usability data collected during Treatment B. During both Treatment A and Treatment B, there were no unsuccessful attempts of DBSF insertion. During Treatment A, 2 (6.1%) subjects, and during Treatment B, 1(3.0%) subject, were noted to have swallowed DBSF during dosing. 3 (9.1%) additional subjects swallowed DBSF per the protocol which instructed all subjects to swallow the film if it had not completely dissolved 15 minutes after placement. During Treatment A, no patients spit or blew out DBSF following initial adherence to the buccal mucosa, while 3 (9.1%) subjects spit or blew out the film during Treatment B following initial placement. DBSF was generally safe and well tolerated. The most common adverse event possibly related to drug was somnolence reported in two (5.7 %) of 35 of subjects. There were no serious adverse events related to study drug, and no subject withdrew because of an adverse event.

This allowed the investigators to conclude that surprisingly, in the EMU setting, DBSF was successfully administered in both the interictal and ictal/periictal states. This study data supports the safe and effective use of DBSF for the management of selected patients with

refractory epilepsy who require intermittent use of diazepam to control episodes of increased seizure activity. This could also support the capability for usability in the home setting.

Example 29

Another investigation evaludated the pharmacokinetics of diazepam buccal soluble film in adult patients with epilepsy. A comparison of bioavailability with periictal and interictal administration was assessed.

As indicated above, dibuccal soluble film (DBSF) is an exemplary embodiment of the claimed subject matter. It is a novel dosage form of diazepam under development for the management of selected patients with refractory epilepsy who require intermittent use of diazepam to control episodes of increased seizure activity. In this study, the investigators sought to assess pharmacokinetic (PK) performance during or immediately after a seizure. Subjects were investigated while undergoing a clinical epilepsy monitoring unit (EMU) evaluation and on another PK-only visit, with the visits separated by approximately 3 weeks. The study investigated the diazepam maximal plasma concentration (Cmax), time to maximal concentration (Tmax), and partial area under the curve (partial AUC) at 2 or 4 hours in adult subjects with epilepsy following single doses of DBSF under interictal and ictal/periictal conditions.

In this study, adult men and women age 17-65 years with poorly controlled tonic clonic seizures or focal seizures with impaired awareness (N=35) were enrolled in a single-dose crossover to receive DBSF 12.5 mg under both interictal (Treatment A) and ictal/peri-ictal (Treatment B) conditions in a clinical EMU setting. Plasma samples for analysis of diazepam were obtained pre-dose and at intervals until 2h or 4h after dosing. Administration was classified as interictal if there was no observed seizure activity in the preceding 4 hours and as ictal/periictal if DBSF was given during clinically observed seizure activity or within 5 minutes of cessation of seizure activity. Subjects were monitored for adverse events (AE) throughout the study.

The results were as follows: Pharmacokinetic (PK) profiles valid for analysis for both treatment conditions were available for 21 subjects. Most of these subjects had samples collected up to 4 hours but 3 subjects were sampled only up to 2 hours. Subjects were excluded from analysis if both treatments were not completed (N=4), if critical PK time points were missed as adjudicated by an expert blinded to the concentration data (N=3), if pre-dose diazepam concentrations were greater than 5% of Cmax (N=2), or if DBSF was administered in a manner

contrary to instructions (N=5). The table shows values for Cmax, AUC(0-2h), and AUC(0-4h) (geometric means) and the ratio of the geometric means (Treatment B/Treatment A) with 90% CI. Values for Cmax, AUC(0-2h), and AUC(0-4h) were surprisingly similar in interictal and ictal/periictal state, and median values for Tmaxwere not significantly different (Table). DBSF

12.5 mg was shown to be effective, safe and well-tolerated. The most common adverse event possibly related to drug was somnolence reported in two (5.7 %) of 35 of subjects. There were no serious adverse events related to study drug, and no subject withdrew because of an adverse event.

These results demonstrate surprisingly that a single dose of DBSF 12.5 mg administered 10 to adults with epilepsy provides exposure to diazepam under both ictal/peri-ictal conditions that is comparable to that obtained under inter-ictal conditions.

Table of Pharmacokinetic Parameters following DBSF 12.5mg in the Interictal and Ictal/Periictal State

<td colspan="5"> 2-hour Profiles; N=21</td>

<td></td><td> A. Interictal</td><td> B. Ictal/periictal</td><td> Ratio of Geometric Means B/A (%)¹</td><td> 90% CI (%)²</td>

<td></td><td> Geometric Mean</td><td> Geometric Mean</td><td></td><td></td>

<td> Cma_X (ng/mL)</td><td> 198.76</td><td> 184.40</td><td> 92.77</td><td> 74.5 - 112.53</td>

<td> AUC₍₀h) (ng.h/mL)</td><td> 264.57</td><td> 248.06</td><td> 93.76</td><td> 73.86- 119.02</td>

<td></td><td> Median</td><td> Median</td><td></td><td></td>

<td> Tmax (h)</td><td> 0.680</td><td> 0.983</td><td> *</td><td></td>

<td></td><td></td><td></td><td></td><td></td>

<td></td><td></td><td></td><td></td><td></td>

<td colspan="2"> 4-hour Profiles; N=18</td><td></td><td></td><td></td>

<td></td><td></td><td></td><td></td><td></td>

<td></td><td> A. Interictal</td><td> B. Ictal/periictal</td><td> Ratio B/A</td><td> 90% CI</td>

<td></td><td> Geometric Mean</td><td> Geometric Mean</td><td></td><td></td>

<td> Cmax (ng/mL)</td><td> 190.34</td><td> 179.96</td><td> 95.54</td><td> 73.34 -121.89</td>

<td> AUC₍₀h) (ng.h/mL)</td><td> 483.79</td><td> 433.32</td><td> 89.57</td><td> 69.21 -115.91</td>

<td></td><td> Median</td><td> Median</td><td></td><td></td>

<td> Tmax (h)</td><td> 0.767</td><td> 0.533</td><td> **</td><td></td>

<td></td><td></td><td></td><td></td><td></td>

<td colspan="5">¹ Calculated using least-squares means according to the formula: e(Difference) X 100. ² 90% Geometric Confidence Interval using In-transformed data. *Difference in T_max not significant, p = 0.8620; ** Difference in T_max not significant, p=0.5708 (Wilcoxon signed-rank test)</td>

All references cited herein are hereby incorporated by reference herein in their entirety.

Other embodiments are within the scope of the following claims.