Herb library · Herb · Rheum palmatum, R. officinale
Turkey Rhubarb (Chinese Rhubarb)
The dried root of Chinese rhubarb, a stimulant laxative. European regulators accept it for short-term use in occasional constipation in people over 12, for no more than a week.
Traditional use
Known in China for thousands of years as Ta-huang, where it was valued more as a general tonic for the digestive tract than as a purgative. Its root reached Europe by overland trade, which is where the name Turkey rhubarb comes from, and it was official in the United States and British pharmacopeias. It is sold today as a tea and in liquid and solid laxative products.
What studies show
- Established
Occasional constipation, short term: EMA classes rhubarb root as a well-established use, based on published scientific evidence of effectiveness and safety over at least 10 years in the EU, long clinical experience, and studies of how its anthraquinones stimulate the bowel.
Be careful of
Cautions
- AmountUse for no more than a week, usually two or three times a week, at the smallest dose that gives a comfortable soft stool. Long-term use of stimulant laxatives can impair bowel function and create dependence on laxatives; if you need a laxative every day, the cause should be looked into.
- ConditionDo not use it with bowel obstruction or narrowing, loss of bowel muscle tone, appendicitis, Crohn's disease or ulcerative colitis, unexplained abdominal pain, or severe dehydration. People with kidney problems should be aware of possible salt and water imbalance.
- InteractionTalk to a doctor first if you take cardiac glycosides, antiarrhythmics, drugs that prolong the QT interval, diuretics, corticosteroids or licorice root: long-term use can lower potassium, which strengthens or interacts with these.
- NoteSide effects include cramping and abdominal pain, liquid stools, and allergic itching or rash. Long-term use can darken the bowel lining and cause salt and water imbalance and protein or blood in the urine. Harmless yellow or red-brown urine may occur.
- PregnancyNot to be used during pregnancy (some of its anthranoids carry a genotoxic risk in experiments) or while breastfeeding (active metabolites pass into breast milk). Not for children under 12.
- Ask a clinicianTalk with a clinician or pharmacist before using this if you take prescription medicines, are pregnant or breastfeeding, or are giving it to a child.
From the old books
What herbals and dispensaries of the past printed. History, in their words.
“It was collected in Chinese Tartary and sold to the Russian government, at the frontier town of Kiachta, where it was sorted by especially appointed apothecaries, and only the best grade accepted, the inferior grade being destroyed. It came to Europe by way of Asia Minor, and for this reason the term, Turkey rhubarb, established itself.”
“The purgative properties of rhubarb are not made so much of by the Chinese as they are in the west.”
Sources
- Rhei radix - herbal medicinal product (opens in a new tab) · EMA · read September 25, 2026
- European Union herbal monograph on Rheum palmatum L. and Rheum officinale Baillon, radix (opens in a new tab) · EMA · read September 25, 2026
Reviewed September 25, 2026.