A method for producing a patch including a supportlayer and an adhesive layer, comprising the step of formingthe adhesive layer with use of an adhesive layer compositionobtained by mixing an alkali metal diacetate, a drug, anda nonaqueous adhesive base such that the molar ratio betweenthe drug and the alkali metal diacetate (the number of molesof the drug : the number of moles of the alkali metaldiacetate) is from 1:0.5 to 1:15.