How Senna Laxative Works?

You could be recommended senna as a laxative to help relieve constipation if you cannot increase the fibre in your diet, or if this is insufficient. Senna works by encouraging the muscles in your bowel to move stools through your body. This helps you to go to the toilet. It usually has an effect within 8-12 hours.

How long does it take for a senna laxative to work?

Senna takes about 8 hours to work. It's normal to take it at bedtime so it works overnight. Drink plenty of fluids (6 to 8 glasses a day) while you are taking senna or your constipation may get worse.

How does senna make you poop?

Senna contains many chemicals called sennosides. Sennosides irritate the lining of the bowel, which causes a laxative effect.