番泻苷（Senna glycosides，亦作Sennosides）是多种蒽醌类化合物衍生物的合称，具轻泻作用，是一种常见于植物内的天然泻药。番泻苷是一种糖苷二聚体，在决明属植物内的含量很丰富。决明属植物如决明、旃那等，其果子、豆䇲、叶片等均可入药，或作为瘦身茶饮的成份。

依台湾卫生署公告，番泻苷于食品中，其每日食用限量为12毫克以下，孕妇、体虚者避免饮用。因此，当食品生产商要在台湾发售含有番泻苷的食物或加工食物，需要为其食物检测其番泻苷含量，并于食物包装上标明。

Senna glycoside, also known as sennoside or senna, is a medication used to treat constipation and empty the large intestine before surgery. The medication is taken by mouth or via the rectum. It typically begins working in minutes when given by rectum and within twelve hours when given by mouth. It is a weaker laxative than bisacodyl or castor oil.