Bai Tou Weng (Pulsatilla chinensis): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Bai Tou Weng work to treat infections?

Bai Tou Weng contains active compounds including anemonin, protoanemonin, and saponins that demonstrate antibacterial and antiprotozoal properties in laboratory studies. These compounds inhibit the growth of pathogenic microorganisms, particularly amoebae and bacteria responsible for dysentery. The herb also contains tannins that provide astringent effects, helping reduce intestinal inflammation and bleeding. In Traditional Chinese Medicine, it clears heat and toxins from the blood, which correlates with its observed antimicrobial actions. Evidence level: C.

Can I take Bai Tou Weng with antibiotics or other medications?

Limited clinical research exists on specific drug interactions for Bai Tou Weng. Due to its antimicrobial properties, it may potentially affect the efficacy of antibiotic medications. The tannins in the herb may interfere with absorption of certain oral medications if taken simultaneously. Patients taking anticoagulants or antiplatelet drugs should exercise caution, as effects on bleeding have not been thoroughly studied. Always consult a qualified healthcare provider before combining Bai Tou Weng with prescription medications. Evidence level: D.

What is the recommended dosage for Bai Tou Weng?

The typical adult dosage of Bai Tou Weng is 6-15 grams of dried root daily, usually prepared as a decoction. Standardized extracts are commonly dosed at approximately 500mg daily. The herb is typically taken internally for acute conditions such as dysentery or infectious diarrhea. Dosage should be adjusted based on individual constitution, symptom severity, and guidance from a qualified Traditional Chinese Medicine practitioner. Long-term use without professional supervision is not recommended. Evidence level: Traditional.

Is Bai Tou Weng safe to take during pregnancy?

Bai Tou Weng is contraindicated during pregnancy and should be strictly avoided. The herb contains protoanemonin, a compound that can stimulate uterine contractions and potentially cause miscarriage. Traditional Chinese Medicine classifies this herb as having strong heat-clearing and blood-cooling properties, which are considered inappropriate during pregnancy. The herb's antimicrobial and purgative actions may also pose risks to fetal development. Women who are pregnant, trying to conceive, or breastfeeding should not use Bai Tou Weng. Evidence level: C.

What is Bai Tou Weng used for in Traditional Chinese Medicine?

Bai Tou Weng is primarily used to treat amoebic dysentery and infectious diarrhea, conditions where it has demonstrated antibacterial and antiprotozoal activity. In Traditional Chinese Medicine, it is indicated for heat-toxin conditions manifesting as bloody stools, hemorrhoids with bleeding, and bacterial infections of the digestive tract. The herb is also used for conditions involving blood in the stool and certain types of vaginal discharge. It should only be used for hot-type conditions, not cold-type diarrhea. Evidence 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 30 PubMed articles · model: gemma4:31b

Summary

Bai Tou Weng (Pulsatilla chinensis) is a traditional Chinese medicinal herb rich in triterpenoid saponins used primarily for treating bacterial infections and inflammatory conditions [PMID:35606807, PMID:32679180].

Background

Pulsatilla chinensis (Bunge) Regel is a perennial herb of the Ranunculaceae family [PMID:40543694]. Its dried root, known as Pulsatillae Radix, is recorded in the Pharmacopoeia of the People's Republic of China [PMID:35000282, PMID:38314466].

Traditional uses

It has been used in China for thousands of years to treat diseases caused by bacteria [PMID:35606807, PMID:32679180], as well as intestinal amebiasis, vaginal trichomoniasis, and malignant tumors [PMID:37331205, PMID:39696673].

Active compounds

The herb is rich in triterpenoid saponins, most notably anemoside B4 (also known as Pulchinenoside C), which serves as a quality control marker [PMID:35606807, PMID:32679180]. Other identified compounds include anemoside A3, 23-hydroxybetulinic acid [PMID:32679180], pulsatillic acid, pulsatilloside A, B, D, and E [PMID:8768325, PMID:11859478], and Pulsatilla saponins A and F [PMID:35309718, PMID:24576780].

Mechanism of action

Mechanisms include inducing cancer cell apoptosis and inhibiting tumor angiogenesis [PMID:35606807], inhibiting the PI3K/AKT/NF-κB signaling pathway in osteoarthritis [PMID:40746264], and regulating the Wnt/β-catenin signaling pathway in colitis-associated cancer [PMID:41349708]. Anemoside B4 specifically targets RAGE to attenuate ferroptosis in lung injury [PMID:40822455], inhibits pyruvate carboxylase to reprogram macrophage function in colitis [PMID:38157008], and binds to UFM1 to promote MAVS UFMylation for antiviral activity [PMID:40466952]. Other effects include upregulating LDLR via an ERK-dependent manner for antihyperlipidemic activity [PMID:39696673] and regulating GPR43-NLRP3 signaling in ulcerative colitis [PMID:36806339].

Clinical evidence

Evidence DUlcerative Colitis

Pulsatilla Decoction and its saponins (PRS) demonstrate protective effects and alleviate colitis in murine models by modulating gut microbiota and inflammatory cytokines [PMID:38974042, PMID:36806339, PMID:41316147].

Evidence DCancer (Various)

Pulsatilla saponin A and other extracts inhibit growth and induce apoptosis in hepatocellular carcinoma, pancreatic cancer, and lung carcinoma cells in vitro and in mouse xenograft models [PMID:24576780, PMID:40697880].

Evidence DDepression

Pulsatilla chinensis saponins (PRS) ameliorated murine depression by inhibiting intestinal inflammation mediated by IDO1 overexpression [PMID:37167824].

Evidence DHypercholesterolemia

Administration of P. chinensis in rats significantly reduced serum cholesterol and triglycerides [PMID:39696673].

Evidence DSepsis-induced Acute Lung Injury (SALI)

Anemoside B4 ameliorated SALI by targeting RAGE and inhibiting ferroptosis in mouse models [PMID:40822455].

Evidence D

Safety & adverse effects

In vivo toxicity evaluations of Pulsatilla chinensis extract (PCE) demonstrated high oral safety [PMID:40438409].

Evidence summary

The current evidence is primarily based on in vitro cell cultures and in vivo animal models (mice, rats, piglets, and fish), with a strong focus on the pharmacological activities of triterpenoid saponins. There are no human clinical trials provided in the abstracts.

PubMed sources

1.PMID: 35606807 (2022) — Pharmacological activities and molecular mechanisms of Pulsatilla saponins. · Chinese medicine
2.PMID: 32679180 (2020) — Therapeutic potential of triterpenoid saponin anemoside B4 from Pulsatilla chinensis. · Pharmacological research
3.PMID: 37167824 (2023) — Pulsatilla chinensis saponins ameliorated murine depression by inhibiting intestinal inflammation mediated IDO1 overexpression and rebalancing tryptophan metabolism. · Phytomedicine : international journal of phytotherapy and phytopharmacology
4.PMID: 8768325 (1996) — Triterpenoids from Pulsatilla chinensis. · Phytochemistry
5.PMID: 38974042 (2024) — Baitouweng decoction alleviates ulcerative colitis by regulating tryptophan metabolism through DOPA decarboxylase promotion. · Frontiers in pharmacology

Bai Tou Weng

Sources & Citations

Calculate a safe dose of Bai Tou Weng