Patent ID: 8309119

Claim:
An adhesive preparation having an adhesive layer on at least one surface of a support, wherein the adhesive layer comprises a first synthetic rubber, which is 2-methylpropene-polymer having a viscosity average molecular weight of 3,000,000-5,000,000, a drug, which is a fentanyl selected from fentanyl, sufentanyl, and pharmaceutically acceptable salts thereof, an organic liquid component and a tackifier, which is one or more kinds selected from polybutenes, rosin resin, terpene resin, petroleum resin and coumarone resin, wherein the organic liquid component comprises a fatty acid alkyl ester and a long chain alcohol, the long chain alcohol is contained in a proportion of more than 0 wt % and less than 7.5 wt % relative to the total weight of the adhesive layer, and the drug is contained in a proportion of 0.1-10 wt % relative to the total weight of the adhesive layer.