MEDICALLY ACTIVE PLASTER

A medically active plaster for dispensing active pharmaceutical substances that are liquid at room temperature onto the skin, in particular for dispensing the antiphlogistic substance etofenamat, wherein this plaster has a structure according to Figure 1, in which the top layer (a) comprises an inert material, the backing layer (c) comprises a self-adhesive polysiloxane, in which the antiphlogistic substance, preferably etofenamat, possibly together with an agent promoting permeation through the skin, and possibly further additional substances, is incorporated in the form of a dispersion, wherein the backing layer (c) adheres directly to the top layer (a), or possibly is joined to it by means of the intermediate layer (b); and the peelable protective layer (d) comprises an inert material, adheres to the backing layer (c) and can be easily pulled off from the latter.