Used as a stimulant laxative to treat constipation by increasing bowel movement through direct irritation of the intestinal lining. Promotes water retention in the colon and enhances peristalsis, aiding in the evacuation of stool. Commonly found in herbal remedies derived from senna plants. Often used in short-term management of constipation, especially in combination with other laxative agents. Not recommended for long-term use due to risk of electrolyte imbalance and dependency.