A three-layer drug supply system, the core and the middle layer of which are composed of a drug's thermoplastic fusion substance and crystal, on which there is a layer of non drug treated thermoplastic fusion skin, a preparation method, and a contraceptive method, Hormone replacement therapy and the treatment or prevention of sexually transmitted diseases.

摘要

Drug Delivery System comprising at least one compartment with a layer of Thermoplastic Polymer Core loaded with drugs,An intermediate layer of Polymer loaded with drug and a Polymer non Medicated Skin covering the intermediate Layer, method for preparing it and its use in Contraception.