| abstract |
A method for producing a patch including a support layer, and an adhesive agent layer formed on the support layer and including sodium diacetate, a pressure-sensitive adhesive base agent, and asenapine and/or a pharmaceutically acceptable salt thereof. The sodium diacetate is generated from sodium acetate in the presence of the asenapine and/or salt thereof, a content of the asenapine and/or salt thereof in terms of free asenapine in the adhesive agent layer is in range of 3.0 to 20 mg, and when a content of the asenapine and/or salt thereof in terms of free asenapine in the adhesive agent layer is 6.4 mg and the patch is in contact with skin for 24 hours, Cmax of free asenapine is in range of 0.5 to 6.0 ng/mL and tmax of free asenapine is in range of 8 to 28 hr. |