The leaves and the fruit of the plant are used to make medicine. Senna is an FDA-approved nonprescription laxative. It is used to treat constipation and also to clear the bowel before diagnostic tests such as colonoscopy. Senna is also used for irritable bowel syndrome (IBS), haemorrhoids, and weight loss.
While it's truly an awesome natural laxative, we don't recommend use for more than two weeks. Longer use can cause the bowels to stop functioning normally and might cause dependence on laxatives.