PROBLEM TO BE SOLVED: To provide novel administration means of lorcaserin or a pharmaceutically acceptable salt thereof capable of exerting an excellent pharmacological effect while avoiding side effects which may be produced associated with oral administration, in the prevention or treatment of obesity.SOLUTION: The present invention relates to a percutaneous absorption-type preparation having a support and a drug-containing layer, wherein the drug-containing layer contains lorcaserin or a pharmaceutically acceptable salt, an adhesive, a basic compound, and the like as active ingredients.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】肥満症の予防または治療において、経口投与に伴って生じうる副作用を回避しつつ、優れた薬理効果を発揮させることが可能な、ロルカセリンまたはその薬学的に許容される塩の新規投与手段を提供する。【解決手段】支持体と薬物含有層とを有する経皮吸収型製剤であって、該薬物含有層が有効成分としてロルカセリンまたは薬学的に許容される塩、粘着剤、塩基性化合物等を含有する経皮吸収型製剤。【選択図】なし