PROBLEM TO BE SOLVED: To discover an agent that controls secretion of lacrimal fluid.SOLUTION: A lacrimation control composition comprises an agonist or antagonist for the serotonin 5-HT3 receptor as an active ingredient.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】涙液の分泌を調整する薬剤を見出すこと。【解決手段】セロトニン5-HT3受容体の作動薬又は拮抗薬を有効成分として含有する、涙液分泌調整組成物。【選択図】なし