Patent ID: 8628795

Claim:
A transdermal therapeutic system (TTS) comprising: a backing layer comprising polyester and aluminum; and a reservoir layer comprising: buprenorphine as active pharmaceutical ingredient; a polymeric carrier material made of water-repelling polymers; and an adhesive which confers pressure-sensitive adhesive properties onto the reservoir layer; wherein the adhesive is configured to adhere continuously to the surface of a user's skin over a prolonged period of between at least 24 hours and of up to 168 hours; and wherein at least one time segment associated with intensive exposure to water of the TTS adhering to the surface of the skin occurs during the prolonged period; wherein the active ingredient buprenorphine is delivered transdermally during the prolonged period; wherein the adhesive comprises monomers selected from the group consisting of polysiloxanes, polyisobutylenes, and polyacrylates.