Aqueous patch
The purpose of the present invention is to provide an aqueous patch in which basic physical properties as an aqueous patch are less likely to deteriorate and crystals of 1-menthol are less likely to precipitate. The aqueous patch includes, in a pasty preparation, 1-menthol: 0.5% by mass or more and 10% by mass or less, an oil component: 0.2% by mass or more and 19% by mass or less; and silica: 0.1% by mass or more and 5.5% by mass or less.
1 . An aqueous patch comprising, in a pasty preparation,
1-menthol: 0.5% by mass or more and 10% by mass or less,
an oil component: 0.2% by mass or more and 19% by mass or less;
silica: 0.1% by mass or more and 5.5% by mass or less;
a drug;
a water-soluble polymer material; and
water,
wherein the drug comprises at least one selected from the group consisting of lidocaine and a pharmaceutically acceptable salt thereof,
wherein the oil component comprises castor oil,
wherein the ratio of total mass of the drug and the 1-menthol to mass of the oil component is 0.3 or more and 12 or less,
wherein the pasty preparation does not comprise loxoprofen or a pharmaceutically acceptable salt thereof, wherein the pasty preparation does not comprise methyl salicylate, and
wherein the pasty preparation does not comprise polybutene.
2 . The aqueous patch according to claim 1 , comprising, in the pasty preparation,
the drug: 0.5% by mass or more and 10% by mass or less.
3 . The aqueous patch according to claim 2 , wherein the ratio of total mass of the drug and the 1-menthol to mass of the oil component is 0.63 or more and 12 or less.
4 . The aqueous patch according to claim 1 , wherein the ratio of mass of the silica to mass of the oil component is 0.06 or more.
5 . The aqueous patch according to claim 1 , wherein the ratio of mass of the water-soluble polymer material to mass of the oil component is 0.65 or more.
6 . The aqueous patch according to claim 1 , wherein the silica is a powder having a specific surface area of 30 m 2 /g or more and 420 m 2 /g or less as measured by a specific surface area measurement method specified in JIS Z 8830.