To provide a transdermal absorption preparation exhibiting excellent transdermal absorption performance for 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide or a pharmaceutically acceptable salt thereof. A transdermal absorption preparation having a support, and a rubber-based adhesive layer that is formed on the surface of the support and contains 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide or a pharmaceutically acceptable salt thereof, the rubber-based adhesive layer further containing oleic acid, capric acid, and crotamiton.本發明係提供一種對4-(2-甲基-1-咪唑基)-2,2-二苯基丁醯胺或其於藥學上認可之鹽，具有優異的經皮吸收性之經皮吸收型製劑。本發明之經皮吸收型製劑係具有支持體，以及形成於支持體表面上，含有4-(2-甲基-1-咪唑基)-2,2-二苯基丁醯胺或其於藥學上認可之鹽之橡膠系黏著劑層，橡膠系黏著劑層進而含有油酸、癸酸以及克羅他命酮(Crotamiton)。
