A method for producing a patch including a support layer and an adhesive layer, comprising the step of forming the adhesive layer with use of an adhesive layer composition obtained by mixing an alkali metal diacetate, a drug, and a nonaqueous adhesive base such that the molar ratio between the drug and the alkali metal diacetate (the number of moles of the drug : the number of moles of the alkali metal diacetate) is from 1:0.5 to 1:15.
