Bu Zhong Yi Qi Tang (补中益气汤) — Tonify the Middle and Augment the Qi Decoction

On this page

1. Overview
2. TCM pattern
3. Key herbs
4. Formula actions
5. Conditions treated
6. How does Bu Zhong Yi Qi Tang work?
7. Dosage and forms
8. Cautions and contraindications
9. Treatment at my Wokingham clinic
10. Frequently asked questions
11. References

Overview

Bu Zhong Yi Qi Tang — Tonify the Middle and Augment the Qi Decoction — was created by the great physician Li Dongyuan (1180–1251 CE) and forms the cornerstone of his school, which emphasised the central importance of the Spleen and Stomach as the source of postnatal Qi. It is specifically designed to tonify Spleen and Stomach Qi and to raise Qi that has sunk downward — a condition Li identified as the root of many chronic diseases. It remains one of the most widely prescribed Chinese herbal formulas in contemporary clinical practice worldwide.

TCM pattern

Bu Zhong Yi Qi Tang is prescribed for Spleen and Stomach Qi deficiency with sinking of Middle Qi, characterised by: persistent fatigue^[9] that improves with rest, spontaneous sweating, shortness of breath on exertion, poor appetite, loose stools, a bearing-down sensation in the abdomen or pelvis, a pale tongue with thin white coating, and a weak, empty pulse particularly in the right Guan (middle) position.

Key herbs

1. Huang Qi (Astragalus membranaceus root, 1.5-30g) — the principal herb; powerfully tonifies Spleen and Lung Qi and raises Yang
2. Ren Shen (Panax ginseng root, 1-20g) — powerfully tonifies Yuan Qi and Spleen Qi
3. Bai Zhu (Atractylodes macrocephala rhizome, 1-12g) — tonifies Spleen Qi and dries Dampness
4. Zhi Gan Cao (honey-fried Glycyrrhiza root, 1-15g) — tonifies Qi and harmonises
5. Dang Gui (Angelica sinensis root, 0.6-12g) — nourishes Blood and prevents dryness
6. Chen Pi (Citrus reticulata peel, 2-12g) — regulates Qi and prevents stagnation from the tonifying herbs
7. Sheng Ma (Cimicifuga heracleifolia rhizome, 1-10g) — raises and lifts Yang Qi; the key herb for addressing sunken Middle Qi
8. Chai Hu (Bupleurum chinense root, 1-9g) — raises Yang and spreads Liver Qi; works with Sheng Ma to lift sunken Qi

Formula actions

1. Tonifies the Middle Jiao and augments Qi
2. Raises the sunken Yang
3. Lifts prolapse

Conditions treated

1. Chronic fatigue syndrome and burnout — the most widely used formula for post-viral and occupational exhaustion
2. Long COVID — specifically studied for post-COVID fatigue and respiratory weakness
3. Organ prolapse — uterine prolapse, rectal prolapse, gastric ptosis and haemorrhoids from sinking Middle Qi
4. Low-grade persistent fever from Qi deficiency (fever that worsens with exertion)
5. Recurrent infections and poor immune resilience from chronic Spleen Qi deficiency
6. Fertility support where Spleen Qi deficiency underlies poor uterine function or recurrent miscarriage^[15]

How does Bu Zhong Yi Qi Tang work?

The genius of Li Dongyuan’s formula lies in the combination of three actions that other Spleen-tonifying formulas don’t share:

1. Tonifying the Middle — Huang Qi, Ren Shen, Bai Zhu and Zhi Gan Cao build the Spleen Qi substrate directly, while Chen Pi ensures the rich tonifying herbs don’t themselves produce stagnation
2. Raising sunken Yang — the small doses of Sheng Ma and Chai Hu work together to lift Yang Qi upward, addressing the prolapse and bearing-down symptoms that no purely tonifying formula can resolve
3. Preventing dryness — Dang Gui nourishes Blood and keeps the formula from becoming desiccating, an important consideration in patients with chronic depletion

In modern pharmacological terms, the formula has documented immunomodulatory effects (particularly via Huang Qi’s astragalan polysaccharides), HPA-axis regulation, anti-fatigue activity in randomised clinical trials, and supportive effects on gut mucosal integrity. The polysaccharide and saponin content of Huang Qi and Ren Shen accounts for much of the immune and energy-restorative action, while Chai Hu and Sheng Ma contribute the unique “Qi-raising” effect that distinguishes Bu Zhong Yi Qi Tang from formulas like Si Jun Zi Tang and Shen Ling Bai Zhu San.

Dosage and forms

Bu Zhong Yi Qi Tang is available in several forms:

• Pharmaceutical-grade granules (Bu Zhong Yi Qi San) — 4–6 g/day in 2–3 divided doses, dissolved in warm water. Typical course 8–12 weeks for fatigue, longer for prolapse. The most potent and most readily individualised form.
• Patent pills (Bu Zhong Yi Qi Wan) — typically 8–12 small honey-bound pills three times daily. Convenient but lower potency than granules.
• Decoction — the traditional form, made by boiling raw herbs; rarely used in modern UK practice.
• Continuous use — the formula can be taken daily for 3–6 months in chronic fatigue or prolapse without typical accumulation issues; periodic review recommended.

I prescribe pharmaceutical-grade granules from Sun Ten in Taiwan, always within an individualised prescription that may add or subtract herbs based on the actual presentation. Sun Ten granules are tested to international quality and safety standards.

Cautions and contraindications

• Excess heat patterns — contraindicated when fever, red tongue with yellow coat, or strong sympathetic-overactivation signs are present without the underlying Qi deficiency
• Severe Yin deficiency — the formula is mildly drying despite Dang Gui; in marked Yin deficiency it should be combined with Yin-nourishing herbs or replaced with a different formula
• Hypertension with Liver Yang rising — the Qi-raising action can mildly elevate blood pressure; monitor and adjust if BP rises
• Long-term high-dose liquorice exposure — the Zhi Gan Cao component in continuous use can theoretically contribute to pseudo-aldosteronism; monitor blood pressure and serum potassium in long-term use
• Pregnancy — used cautiously; specific traditional indications include threatened miscarriage from Spleen Qi sinking, but should only be prescribed by a qualified herbalist

Always consult a qualified Chinese herbalist registered with the Register of Chinese Herbal Medicine (RCHM). Never self-prescribe Chinese herbal formulas without professional guidance. Online herbal consultations are available. See the prices page for costs.

Treatment at my Wokingham clinic

I prescribe Bu Zhong Yi Qi Tang at my clinic at 49 Denmark Street, Wokingham, RG40 2AY for patients with chronic fatigue syndrome, post-viral fatigue (including long COVID), burnout, recurrent infections from chronic Spleen Qi deficiency, organ prolapse, and fertility support in patients where Spleen Qi sinking underlies the picture. Patients travel from across Berkshire — Reading, Bracknell, Twyford, Crowthorne, Sandhurst and the wider Thames Valley — for combined acupuncture and Chinese herbal medicine treatment.

The initial 90-minute consultation reviews your full medical history, current medications, sleep, digestion, menstrual cycle (in women) and the specific quality of your fatigue or prolapse symptoms. Tongue and pulse diagnosis confirms the Spleen Qi deficiency with Middle Qi sinking pattern. The first session usually includes acupuncture treatment so you experience the technique alongside the herbal prescription. Follow-up sessions are 60 minutes. The typical course is 8–12 weeks of daily herbal formula combined with weekly acupuncture, then monthly maintenance for sustained recovery.

Online Chinese herbal medicine consultations are available throughout the UK and worldwide for patients who cannot attend the clinic in person; the formula is posted directly to your door after a full video consultation. I am a member of the British Acupuncture Council (BAcC) and the Register of Chinese Herbal Medicine (RCHM) with over 25 years of clinical experience.

Frequently asked questions about Bu Zhong Yi Qi Tang

How long until I notice a difference on Bu Zhong Yi Qi Tang?

Most patients with chronic fatigue notice some improvement in energy and digestion within 2–3 weeks. Substantial improvement in fatigue scores, sweating and exertional shortness of breath typically develops over 6–12 weeks. Prolapse symptoms respond more slowly — expect 3–6 months for meaningful tissue tone improvement, with continued maintenance for stabilisation.

Can I take Bu Zhong Yi Qi Tang alongside conventional medication for chronic fatigue or long COVID?

Yes. No clinically significant pharmacokinetic interactions have been reported between Bu Zhong Yi Qi Tang and the medications commonly used for chronic fatigue (low-dose naltrexone, modafinil, beta-blockers for POTS overlay) or long COVID supportive treatments. Always inform both your prescribing doctor and your Chinese herbalist of all medications and herbs you are taking.

What is the difference between Bu Zhong Yi Qi Tang and Si Jun Zi Tang?

Si Jun Zi Tang is the foundation Spleen Qi tonification formula — it builds the substrate but does not raise sunken Qi. Bu Zhong Yi Qi Tang adds Huang Qi (more powerful Qi tonifier), Dang Gui (Blood tonification), Chen Pi (Qi-moving to prevent stagnation), and crucially Sheng Ma and Chai Hu (the “Yang-raising” pair) for prolapse and sinking symptoms. Use Si Jun Zi Tang for simple Spleen Qi deficiency without sinking; Bu Zhong Yi Qi Tang when there are sinking, prolapse or bearing-down symptoms in addition.

Is Bu Zhong Yi Qi Tang the right formula for my long COVID fatigue?

It depends on the TCM pattern. For long COVID presenting with profound fatigue, exertional intolerance, mild fever-on-exertion, recurrent infections and digestive weakness — the picture is classic Spleen Qi deficiency with Middle Qi sinking, and Bu Zhong Yi Qi Tang is one of the most frequently used formulas. For long COVID presenting with marked anxiety, palpitations, insomnia and Yin-deficient features, a different formula (often involving Suan Zao Ren Tang or Sheng Mai San) is more appropriate. A practitioner consultation determines which pattern fits.

Can Bu Zhong Yi Qi Tang help with uterine or rectal prolapse?

Yes, in early-to-moderate prolapse it is one of the most effective non-surgical interventions. Treatment is typically 6–12 months of daily herbal formula combined with appropriate pelvic floor exercise. For advanced prolapse with significant anatomical descent, surgical repair is usually needed; the herbal formula can support recovery and reduce recurrence rates post-surgery. Coordinate with your gynaecologist or colorectal surgeon for advanced prolapse.

Should I buy patent pills off the shelf or get a practitioner prescription?

Patent pills work for some patients with classical Spleen Qi sinking presentation but are weaker than individualised granules and miss the modifications that make the formula most effective for your specific picture. A practitioner consultation determines whether Bu Zhong Yi Qi Tang is the right base formula and which additions or substitutions to make for your individual pattern (for example, adding warming herbs in cold-pattern fatigue, or Yin-nourishing herbs in dryness overlay).

Does Bu Zhong Yi Qi Tang interact with my immune-modulating medication?

Bu Zhong Yi Qi Tang has mild immunomodulatory action (particularly via Huang Qi’s polysaccharides). In patients on immunosuppressive medication (post-transplant, autoimmune disease) the herbal immune-supportive action could theoretically interact with the prescribed suppression goal. Disclose all herbs to your rheumatologist or transplant team and consider deferring the formula until off immunosuppression unless your specialist explicitly approves the combination.

Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide. After a full video consultation, Dr (TCM) Attilio D'Alberto formulates a bespoke herbal prescription and posts your Chinese herbs directly to your door.

References

[9] Wang YY, Li XX, Liu JP, Luo H, Ma LX, Alraek T. Traditional Chinese medicine for chronic fatigue syndrome: a systematic review of randomized clinical trials. Complement Ther Med. 2014 Aug;22(4):826-33. https://doi.org/10.1016/j.ctim.2014.06.004. PMID: 25146086.

[15] Xie H, Zhang A, Mou X, He T, Li J, Wang CC, Fan X, Li L. Chinese herbal medicine for threatened miscarriage: An updated systematic review and meta-analysis. Front Pharmacol. 2023 Feb 14;14:1083746. https://doi.org/10.3389/fphar.2023.1083746. PMID: 36865912.