Senna is a herb that is generally used for its laxative properties. Senna formerly, plants in Cassia (genus) is also known as wild senna, cassia marilandica, or locust plant. It works by interacting with the bacteria in the digestive track, resulting in intestinal contractions. These contractions are caused by the anthraquinone that is contained in senna. These dimeric glycosides anthraquinone derivatives are known as Senna glycosides or sennosides. They are named after their abundant occurrence in these plants of the genus Senna. The main forms of these glycosides are often referred to by: A, B, C & D. Both leaves and pods of the senna plant are used for their laxative effects. The pods are less potent than the leaves.