Medicated dressing

The invention relates to active substance patch for the controlled release of active ingredients to the skin, consisting of a cover layer, an associated water-insoluble adhesive film of a rubber / adhesive resin composition. in which the or the active ingredients is soluble or partially soluble bziehungsweise are, and a covering the adhesive film, removable protective layer, which is characterized in that the or swellable the active ingredients in the rubber / adhesive resin mass together with one in water, in the adhesive film is not soluble polymers in an amount of 3 to 30 wt .-%, based on the mixture of Kautschuk'Kleberharzmasse is present together with the water-swellable, non-soluble in the adhesive film polymer in the determined amount, in particular an increase of drug release from the patch from the duplicate and more possible.