Sona Senna Capsules - 60 Capsules (Pack of 2)About this Product Senna contains compounds called sennosides. These compounds irritate the lining of the bowel, producing a laxative effect. Senna is most often used as a laxative to relieve constipation or, in some cases, to aid in weight loss and promote detoxification. Additionally, senna prevents the reabsorption of water and electrolytes from the colon, which increases fluid in the intestines and softens the stool.