Dispenser

PCT No. PCT/AU94/00355 Sec. 371 Date Dec. 28, 1995 Sec. 102(e) Date Dec. 28, 1995 PCT Filed Jun. 28, 1994 PCT Pub. No. WO95/11137 PCT Pub. Date Jan. 12, 1995A dispenser (FIG. 1, 1) comprises a reservoir (10) of a physiologically active substance and a droplet ejection device (14), for example a bubble jet or pizeoelectric device, which is controlled to issue a predetermined number of discrete droplets of the substance from ejection orifices (15) upon actuation. Device (14) may be actuated by a pressure transducer (19) responsive to inhalation and issue the droplets into an airstream (A) which enters at slot (7) and is then inhaled via mouthpiece (5). In other embodiments (FIG. 5) the dispenser is finger actuated and directed by hand for topical application. The number and/or frequency of droplets issued is programmatically controlled by a control circuit (16) whereby average and total dose of the substance are predetermined.