Patent ID: 11382870

Abstract:
The present invention provides a risperidone-containing patch having an excellent drug release property and patch physical properties. Specifically, the present invention provides a medical patch comprising an adhesive composition comprising risperidone or a pharmaceutically acceptable salt thereof; a carboxylic acid; a fatty acid ester; and an adhesive, characterized in that said adhesive is a star-shaped acrylic block polymer having a star-shaped structure in which at least three chain polymer portions radiate from a sulfur residue of a mercapto group situated at the center, wherein the (meth)acrylic acid alkyl ester structural units having 7-17 carbon atoms account for 30-99.99% by mass of the whole structural units in said star-shaped acrylic block polymer, and at least one of said chain polymer portions has a structural unit having a copolymer structure of polymerizable monomers comprising a (meth)acrylic acid alkyl ester having 7-17 carbon atoms and a polyfunctional monomer.