| abstract |
The invention relates to active ingredient plasters for the controlled release of active ingredients to the skin, which consists of a backing layer and an associated, water-insoluble adhesive film made of a pressure sensitive adhesive which contains water-swellable polymers and in which the active ingredient is at least partially soluble, and one of the Adhesive film-covering, removable protective layer, which is characterized in that the pressure sensitive adhesive is based on homo- and / or copolymers with at least one derivative of acrylic or methacrylic acid and as active ingredients partially or completely dissolved in the adhesive in a concentration of 0.5 to 10 , 0% by weight of estrogens and their pharmaceutically acceptable derivatives, alone or in combination with gestagens. |