Multilayer plaster

Details Multilayer plaster Multilayer plaster

A - Human Necessities

61

K

167/159

A61K 9/70 (2006.01) A61K 47/22 (2006.01) A61L 15/44 (2006.01)

Patent

CA 1337270

The invention relates to a transdermal therapeutic system in the form of a multilayer plaster for the administration of active substances which are able to permeate, in the form of a matrix system containing at least three layers: a) a covering layer which is impermeable for the constituents of the reservoir b); b) a reservoir layer which is able to deliver active substance and which consists of optionally crosslinked block copolymer based on styrene, alkadienes and optionally alkenes mixed with adhesive polymers and is optionally provided with an additional adhesive membrane layer and contains at least one active substance capable of skin permeation, at least one agent promoting the skin permeability of active substances and optionally further pharmaceutical auxiliaries, and c) a protective film which can be pulled off the reservoir layer.

607068

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