PROBLEM TO BE SOLVED: To provide a basic drug salt-containing transdermal tape that does not require a special crushing process, has excellent transdermal absorbency, and is free from the problem of crystal deposition and the like.SOLUTION: A method for producing a basic drug salt-containing transdermal tape comprises a step in which a basic drug salt is dissolved or is turned into oily matter in a liquid comprising water, sodium acetate and organic solvent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT