Patent ID: 8864727
Filing Date: 2014-10-21
Classification: A61F,A61K,A61P

Abstract:
1. A transdermal delivery system comprising: a first adhesive layer comprising a drug; a drug-free second adhesive layer provided below the first adhesive layer so as to contact with the first adhesive layer and controlling a delivery rate of the drug; and a third adhesive layer provided below the second adhesive layer so as to contact with the second adhesive layer and comprising the drug, wherein the drug-free second adhesive layer is in contact with the first adhesive layer on its one surface and is in contact with the third adhesive layer on the opposite surface, and wherein the first adhesive layer and the third adhesive layer each have a solubility for the drug 1.1 to 50 times larger than the solubility of the second adhesive layer for the drug.