The present invention aims at providing an adhesive preparation wherein a drug is sufficiently dissolved in an adhesive layer and is not easily separated from the adhesive layer even during preservation of the adhesive preparation.The present invention provides an adhesive preparation having an adhesive layer on at least one surface of a support, wherein the adhesive layer comprises a first synthetic rubber having a viscosity average molecular weight of 1,600,000 - 6,500,000, a drug, an organic liquid component and a tackifier. The present invention further provides the aforementioned adhesive preparation, wherein the organic liquid component is contained in the adhesive layer in a proportion of 20 wt% or above relative to the total weight of the adhesive layer.
