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Limited evidenceWomen's health

Ba Zhen Tang

A classic eight-herb Chinese formula combining the qi tonic Si Jun Zi Tang with the blood tonic Si Wu Tang, used for fatigue and post-partum or post-illness depletion. Most trials are small, conducted in China as add-on therapy, and of low methodological quality.

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What the science says

  • Add-on to chemotherapy for myelosuppression Limited evidence

    A systematic review and network meta-analysis of Chinese herbal medicines combined with adjuvant chemotherapy in colorectal cancer included Bazhen decoction among the formulas assessed for improving myelosuppression. The included trials were mostly small, unblinded and published in Chinese, which limits how far the pooled results can be trusted.

  • Small obstetric and surgical trials Limited evidence

    Randomized trials have tested modified Bazhen decoction for cervical ripening alongside oxytocin and for post-operative recovery, reporting benefits on nutritional and immune parameters. Sample sizes are in the dozens, blinding is generally absent and no Western replication exists.

  • Blood-loss indication comes from indirect comparison Limited evidence

    A Bayesian network meta-analysis of herbal medicines for hidden blood loss after hip fracture surgery ranked several formulas including Bazhen-type decoctions. Network meta-analyses of low-quality primary trials inherit that low quality.

Dosage & safety

Studied doseTraditional decoction of the eight herbs (typically ren shen, bai zhu, fu ling, gan cao, dang gui, shu di huang, bai shao, chuan xiong) taken once or twice daily; granule or pill forms usually state 6–9 g twice daily. Doses in trials are not standardized across studies.
SafetyGenerally reported as well tolerated, with digestive upset the usual complaint. Contains liquorice (gan cao), which in prolonged or high use can cause potassium loss, fluid retention and raised blood pressure. Dang gui may interact with warfarin. Avoid self-prescribing in pregnancy, and avoid during acute infection or fever, which traditional practice considers a contraindication for tonic formulas. Quality and heavy-metal contamination vary by supplier.

How to take it

TimingTaken once or twice daily, traditionally before meals.
With food?Take it with warm water before food; move it to after food if it causes digestive upset.
Worth knowingTraditional practice stops tonic formulas during fever or acute infection — a reasonable rule to follow.

Interactions

With medications

  • diuretics and corticosteroids

    The liquorice component causes potassium loss that these drugs compound. Avoid prolonged use together and have potassium checked

  • blood pressure medication

    Liquorice raises blood pressure and fluid retention, working against treatment. Limit to short courses and monitor blood pressure

  • warfarin and other anticoagulants

    Dang gui has been reported to increase warfarin's effect. Do not combine without INR monitoring

With other supplements

  • other liquorice-containing herbal formulas

    Liquorice effects on potassium and blood pressure add up across products. Do not run two liquorice-containing formulas at once

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

What is ba zhen tang used for?

Ba zhen tang is a classic eight-herb Chinese formula combining a qi tonic and a blood tonic, used for fatigue and depletion after childbirth or illness. Its trials are mostly small Chinese add-on studies of low quality, so the evidence is limited.

Does ba zhen tang help during chemotherapy?

Unproven: a network meta-analysis included ba zhen tang among herbal formulas assessed for chemotherapy-related bone marrow suppression in colorectal cancer, but the trials were mostly small, unblinded and published in Chinese. Discuss any herbal formula with your oncology team.

Is ba zhen tang safe with warfarin or blood pressure medication?

Be careful: the dang gui in ba zhen tang may increase warfarin's effect, so do not combine without INR monitoring, and its liquorice can raise blood pressure and cause potassium loss with prolonged use. Limit it to short courses if you take blood pressure drugs or diuretics.

How much ba zhen tang per day?

Ba zhen tang granules or pills usually state 6–9 g twice daily, traditionally before meals, though trial doses are not standardized. Traditional practice stops tonic formulas during fever or acute infection, and it should not be self-prescribed in pregnancy.

Scientific references

Related in Women's health

Herbal medicines: what the evidence says (335)