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What Is Senna?

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  • Written By: Bronwyn Harris
  • Edited By: O. Wallace
  • Last Modified Date: 07 April 2014
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Senna, or cassia, is an herb that has been used as a laxative for over a thousand years. This herb is also known as India senna, tinnevelly senna, Cassia senna, Khartoum senna, and Alexandrian senna. It contains anthraquinone, which causes intestinal contractions by interacting with bacteria in the digestive track. The leaves and pods of the plant are used for people suffering from constipation.

Found in many commercial laxatives, senna is also found undiluted at health food stores. It is available as a liquid extract, dried pods, or capsules. The recommended dosage is 0.5 teaspoon (about 2.5 ml) of liquid leaf extract or 50 to 100 mg capsules. Dried pods can be brewed into a tea, using three to six for each cup of water. As senna tastes very unpleasant, the tea should be mixed with another flavor.

When taken before bed, senna will produce a bowel movement in the morning, 6 to 12 hours later. The herb should be kept kept in a dark dry area, protected from both light and moisture. Anyone taking it should follow the directions on the package carefully.

Senna should not be taken for more than a week straight, or a dependency can develop. There are many side effects that may occur from using this herb, including toxicity and increased risk of colon cancer. Diarrhea can also occur, as can pigmentation of the colon, laxative dependency, and enlargement of the ends of the toes and fingers. Senna may also discolor the urine.

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People suffering from Crohn's disease or other serious digestive diseases should not use senna. It should not be used by people with diverticular disease, colitis, congestive heart failure, gastrointestinal cancer, liver disease, kidney disease, or recent colon surgery.

Anyone using herbal supplements should inform his or her regular healthcare provider, as they may interact with other medications. A trained herbalist may be able to offer additional information about herbal supplements.

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Discuss this Article

anon120750
Post 2

is senna safe with only one kidney?

anon21214
Post 1

I've been taking senna for six weeks now, about four times the recommended dose. . .how easily can i stop?

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