A medicated patch comprising a medicinal agent, an adhesive base material and a tackifire, wherein the medicinal agent is varenicline or a pharmaceutically acceptable salt thereof, the adhesive base material is a rubbery adhesive base material and the tackifire is a rosin-based tackifire selected from the group consisting of rosin, rosin derivatives and hydrogenated products of the foregoing, or a non-rosin-based tackifire selected from the group consisting of aliphatic hydrocarbon resins and alicyclic hydrocarbon resins, and when a non-rosin-based tackifire is added as the tackifire, a solubilizer for the medicinal agent is further added, the solubilizer comprising an alcohol-based solubilizer having at least a solubility parameter of 20-35.