transdermal therapeutic system (tts) containing (meth) ammoniogruppenhaltige acrylatpolymere for administration of levonorgestrel

摘要

A stable therapeutical transdermal system for the transcutaneous delivery of levonorgestrel, alone or together with other sex steroid hormones, over a long time period is disclosed. A method of producing the transdermal system that avoids the use of solvents and avoids degradation of the steroid hormones also is disclosed.