Abstract: The problem of the present invention is to provide a patch preparation containing a drug (excluding 2-(4-ethyl-1-piperazinyl)-4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine and a physiologically acceptable acid addition salt thereof), which is superior in both the skin permeability of a drug, and adhesiveness in the presence of water. A patch preparation containing a support and an adhesive layer on one surface of the support, wherein the adhesive layer contains a drug excluding 2-(4-ethyl-1-piperazinyl)-4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine and a physiologically acceptable acid addition salt thereof, an acrylic polymer, lactic acid and magnesium aluminometasilicate.

Abstract: A patch preparation containing a support and an adhesive layer formed on one surface of the support, wherein the adhesive layer contains 2-(4-ethyl-1-piperazinyl)-4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine or a physiologically acceptable acid addition salt thereof, an acrylic polymer, lactic acid, sesame oil and one or more kinds of stabilizers selected from 2-mercaptobenzimidazole, 2,6-di-tert-butyl-4-methylphenol and propyl gallate. A patch preparation containing a support and an adhesive layer containing lactic acid and magnesium aluminometasilicate and formed on at least one surface of the support, which preparation is superior in both skin permeability and adhesiveness in the presence of water.

Abstract: The problem of the present invention is to provide a patch preparation containing a drug (excluding 2-(4-ethyl-1-piperazinyl)-4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine and a physiologically acceptable acid addition salt thereof), which is superior in both the skin permeability of a drug, and adhesiveness in the presence of water. A patch preparation containing a support and an adhesive layer on one surface of the support, wherein the adhesive layer contains a drug excluding 2-(4-ethyl-1-piperazinyl)-4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine and a physiologically acceptable acid addition salt thereof, an acrylic polymer, lactic acid and magnesium aluminometasilicate.

Abstract: The problem of the present invention is to minimize the influence of lactic acid on the property of an adhesive layer, and provide a production method of a patch preparation, which is capable of affording a patch preparation superior in the property of an adhesive layer. A method of producing a patch preparation comprising (a): a step of forming an adhesive layer containing a drug (excluding 2-(4-ethyl-1-piperazinyl)-4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine and a physiologically acceptable acid addition salt thereof), an acrylic polymer and an organic liquid component compatible with the acrylic polymer, but without containing lactic acid, and (b): a step of adding lactic acid to the aforementioned adhesive layer.