Senna Leaf is commonly known as senna or Alexandrian senna, and its scientific name is Cassia angustifolia. Senna has been used since the 9th century by Arabian physicians as a laxative and has been known as the "cleansing herb." "Only the leaves and the pods of the herb are therapeutically useful," bhavnagar, gujarat Herbs 2000. Senna is often taken as a tea, capsule, tablet or liquid extract. Senna leaf acts on the intestinal walls, causing contractions that lead to bowel movements.