Patent ID: 8361493

Claim:
A patch preparation comprising: a support; and a pressure-sensitive adhesive layer on at least one surface of the support, wherein the pressure-sensitive adhesive layer comprises a drug that is transdermally administerable and an acrylic copolymer obtained by a method comprising copolymerizing monomer components comprising at least one (meth)acrylic acid alkyl ester monomer, at least one N-hydroxyalkyl(meth)acrylamide monomer, and at least one of a vinyl ether monomer and a vinyl-based monomer, said vinyl-based monomer having a heterocycle comprising a nitrogen atom, the (meth)acrylic acid alkyl ester monomer is included in an amount of 50 wt % to 90 wt % with respect to a total amount of the monomer components, the N-hydroxyalkyl(meth)acrylamide monomer is included in an amount of 1 wt % to 20 wt % with respect to the total amount of the monomer components, the monomer components are substantially free of a monomer having a carboxyl group, the (meth)acrylic acid alkyl ester monomer is at least one monomer selected from the group consisting of butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, cyclohexyl acrylate, and cyclohexyl methacrylate, and the at least one of a vinyl ether monomer and a vinyl-based monomer is at least one monomer selected from the group consisting of methyl vinyl ether, ethyl vinyl ether, N-vinyl-2-pyrrolidone, 1-vinyl caprolactam, 2-vinyl-2-piperidone, and 1-vinylimidazole.