Senna is a laxative. More specifically, senna stimulates the intestines to empty their contents. And, if you take senna, plan on booking some bathroom time because you will be in there. The problem here is that senna is addictive, and if you use it too much, when you stop using it, you may not see the bathroom for a long time. Not an herb I reccomend.
Disclaimer: The author makes no guarantees as to the the curative effect of any herb or tonic on this website, and no visitor should attempt to use any of the information herein provided as treatment for any illness, weakness, or disease without first consulting a physician or health care provider. Pregnant women should always consult first with a health care professional before taking any treatment.