| abstract |
An object of the present invention is to provide a fentanyl transdermal patch, which is a simple manufacturing method, has long-lasting durability, and has excellent adhesion to and adherence to the skin. The above object is a support of the present invention and a patch having an adhesive layer on one surface of the support, and the adhesive layer contains fentanyl, an adhesive base and a tackifier resin as active ingredients. And the adhesive base comprises polyisobutylene and a styrene-isoprene-styrene block copolymer, and the blending amount of the polyisobutylene is 8 to 15% by mass, and the polyisobutylene and the styrene-isoprene-styrene block copolymer The concentration ratio with the polymer is achieved by the patch, which is 2: 3 to 3: 2. |