A method for producing an adhesive patch comprising a supporting body layer and an adhesive layer, which comprises a step for forming the adhesive layer with use of an adhesive layer composition that is obtained by mixing an alkali metal diacetate salt, a medicament and a nonaqueous adhesive base so that the molar ratio of the medicament to the alkali metal diacetate salt ([the mole number of the medicament]:[the mole number of the alkali metal diacetate salt]) is from 1:0.5 to 1:15.
