Ex-Lax Tablet contains Sennosides. It is a natural medicine that is derived from the leaves of the senna plant. Sennosides irritate the lining of the bowel causing a laxative effect. Sennosides has been used in alternative medicine as a laxative and an aid to treat constipation. Constipation is a condition in which there is difficulty in emptying the bowels, usually associated with hardened faeces. Constipation is a common cause of painful defecation . Severe constipation includes obstipation (failure to pass stools or gas) and fecal impaction , which can progress to bowel obstruction and become life-threatening. Sennosides is an FDA-approved non-prescription laxative. Sennosides is also used for Irritable Bowel Syndrome (IBS), hemorrhoids, and weight loss.