Alexandrian senna comes from the leaves and pods of *Senna alexandrina*. It contains sennosides that prompt a bowel movement by irritating the intestinal lining. People use it for short-term constipation relief, often before medical procedures or after surgery. You can take it as a tea, tablet, or liquid extract, usually at bedtime. Effects typically start within 6 to 12 hours.
Limit use to seven days or less. Longer use can cause dependence and electrolyte problems like low potassium. These issues are especially risky if you take diuretics, heart medicines (such as digoxin), or corticosteroids. Do not use senna while pregnant or breastfeeding. Avoid it if you have an intestinal blockage, ongoing abdominal pain, or hemorrhoids.