Rheum officinale (Rheum officinale): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Rheum officinale work as a laxative?

Rheum officinale contains anthraquinone glycosides, including emodin, aloe-emodin, and rhein, which exert laxative effects through two primary mechanisms. These compounds stimulate colonic motility by increasing propulsive contractions in the intestinal wall. Additionally, they promote fluid secretion into the intestinal lumen by inhibiting water and electrolyte absorption. Gut bacteria convert the anthraquinone glycosides into active metabolites that directly stimulate the intestinal mucosa, typically producing bowel movements within 6-12 hours after ingestion. Evidence level: Traditional use with pharmacological support (Level C).

Does Rheum officinale interact with prescription medications?

Yes, Rheum officinale has several potential drug interactions. Its laxative effects may reduce absorption of oral medications by decreasing intestinal transit time. Potassium loss from prolonged use can increase the toxicity of cardiac glycosides such as digoxin. Concurrent use with diuretics may worsen electrolyte imbalances. The herb may potentiate the effects of anticoagulant medications due to potential vitamin K depletion. Patients taking prescription medications should consult a healthcare provider before using Rheum officinale. Evidence level: Theoretical interactions based on pharmacology (Level C).

What is the recommended dosage of Rheum officinale for constipation?

For constipation relief in adults, the typical dosage of dried Rheum officinale root is 1-3 grams daily, prepared as a decoction or taken in powder form. Lower doses of 0.5-1 gram function as a digestive tonic rather than a strong laxative. The herb should be taken with adequate fluids. Effects typically occur within 6-12 hours, so evening dosing is often recommended. Use should be limited to short-term treatment of 1-2 weeks maximum to prevent dependence and electrolyte disturbances. Evidence level: Traditional use (Level C).

Is Rheum officinale safe to take during pregnancy?

No, Rheum officinale is contraindicated during pregnancy and breastfeeding. The anthraquinone compounds can stimulate uterine contractions and may cause miscarriage or premature labor. The laxative effects may also lead to dehydration and electrolyte imbalances that could harm both mother and fetus. Small amounts of active constituents may pass into breast milk and cause diarrhea in nursing infants. Pregnant or breastfeeding women should avoid this herb entirely and consult a qualified healthcare practitioner for safer alternatives. Evidence level: Traditional contraindication (Level C).

What side effects can occur from taking Chinese rhubarb root?

Common side effects of Rheum officinale include abdominal cramping, diarrhea, and loose stools, which are expected effects of its laxative action. Prolonged or excessive use can cause significant electrolyte imbalances, particularly potassium depletion, which may lead to muscle weakness and cardiac irregularities. Chronic use may result in laxative dependence, where the colon cannot function normally without stimulation. Kidney stones have been reported with excessive use due to oxalate content. Discontinue use if severe symptoms develop. Evidence level: Traditional use and pharmacological data (Level C).

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 29 PubMed articles · model: gemma4:31b

Summary

Rheum officinale is a traditional Chinese medicine (TCM) root and rhizome used for its purgative, anti-inflammatory, and renoprotective properties [PMID:30000922, PMID:40472396, PMID:40657042].

Background

Rheum officinale (Chinese rhubarb) is a member of the Polygonaceae family [PMID:32289000, PMID:37634079]. It is widely recognized as an important natural medicine for managing kidney disorders, cancer, and cardiovascular diseases [PMID:41158982].

Traditional uses

It has been used in TCM to purge accumulation, clear heat, detoxify, and treat conditions such as constipation, chronic renal failure, upper gastrointestinal bleeding, abdominal pain, damp-heat dysentery, and intestinal carbuncles [PMID:30000922, PMID:42276390, PMID:40472396]. Topical applications have been used for gingivitis and herpes infections [PMID:30000922].

Active compounds

The plant contains anthraquinones (including emodin, aloe-emodin, chrysophanol, rhein, danthron, and physcion), tannins, stilbenes, and phenylbutazones [PMID:30000922, PMID:32289000, PMID:40657042].

Mechanism of action

Active components like emodin demonstrate cytotoxic effects via cell cycle arrest and induction of apoptosis [PMID:32289000]. It exhibits anti-inflammatory, antioxidant, and antifibrotic properties, including the inhibition of TGF-β to slow kidney disease progression [PMID:37808167, PMID:40657042, PMID:24773179]. Chrysophanein may target the CCDC25/ILK/HIF-1α pathway to repair mucosal barrier integrity in ulcerative colitis [PMID:40992441].

Clinical evidence

Evidence AChronic Renal Failure

A meta-analysis of nine clinical trials suggested that supplementing ACE inhibitors or ARBs with Rheum officinale may delay the progression of chronic renal failure by lowering serum creatinine and blood urea nitrogen levels [PMID:29208203].

Evidence BChronic Kidney Disease (Cats)

A randomized prospective study investigated if Rheum officinale slows the progression of CKD in cats, noting its antifibrotic properties [PMID:24773179].

Evidence BAcute Diverticulitis

In a randomized double-blind placebo-controlled trial, the Kampo formula daiobotanpito (containing rhubarb) showed no significant difference in treatment success rates compared to placebo for fever reduction or pain elimination [PMID:40595170].

Safety & adverse effects

Rheum officinale has been associated with rare hepatotoxicity and liver injury [PMID:26357619, PMID:25536637]. It is also identified as a potential cause of nephrotoxicity, specifically damaging renal proximal tubules or causing interstitial nephritis via alteration of organic anion transporters 1 and 3 [PMID:32245589].

Pregnancy & lactation

Rhubarb should not be used during breastfeeding due to possible cathartic effects on the breastfed infant, although older studies suggested laxative doses did not pass into milk [PMID:30000922].

Evidence summary

Evidence ranges from high-level meta-analyses for renal function to preliminary animal/in-vitro studies for anticancer and anti-inflammatory effects; however, many traditional uses lack support from well-controlled trials [PMID:30000922, PMID:29208203].

PubMed sources

1.PMID: 30000922 (2006) — Rheum officinale (a traditional Chinese medicine) for chronic kidney disease. · The Cochrane database of systematic reviews
2.PMID: 32289000 (2012) — Anticancer potential of emodin. · BioMedicine
3.PMID: 37808167 (2023) — Mechanism of rhubarb in the treatment of hyperlipidemia: A recent review. · Open medicine (Warsaw, Poland)
4.PMID: 40472396 (2025) — Insights into the functional characteristics of rhubarb (Rheum officinale Baill) treatment on experimental traumatic brain injury through network pharmacology with metagenomics. · Phytomedicine : international journal of phytotherapy and phytopharmacology
5.PMID: 40657042 (2025) — Anthraquinones from Rheum officinale Ameliorate Renal Fibrosis in Acute Kidney Injury and Chronic Kidney Disease.

Rheum officinale

Sources & Citations

Calculate a safe dose of Rheum officinale