Bu Zhong Yi Qi Tang
Star补中益气汤 (Tonify the Middle to Augment the Qi)
Source: Pi Wei Lun — Li Dongyuan (Jin-Yuan, 1249)
Last updated August 30, 2026
Description
Bu Zhong Yi Qi Tang (Tonify the Middle to Augment the Qi) is the primary formula for Spleen Qi deficiency with sinking of Qi. Developed by Li Dongyuan, it uniquely treats the failure of deficient Qi to maintain its lifting function, addressing organ prolapse, chronic diarrhea, and the unusual presentation of low-grade fever from deficiency. Its uplifting action is achieved through Chai Hu and Sheng Ma combined with potent Qi tonics.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
| Huang Qi | 15g | 21.74% | Jun (Chief) | Tonifies Spleen and Stomach Qi, raises Yang, consolidates exterior. |
| Ren Shen | 9g | 13.04% | Chen (Deputy) | Powerfully tonifies Yuan Qi, strengthens Spleen. |
| Bai Zhu | 9g | 13.04% | Chen (Deputy) | Tonifies Spleen Qi, dries dampness. |
| Gan Cao | 9g | 13.04% | Chen (Deputy) | Tonifies Qi, harmonizes middle burner. |
| Dang Gui | 9g | 13.04% | Zuo (Assistant) | Nourishes Blood, prevents dryness from Qi tonification. |
| Chen Pi | 6g | 8.7% | Zuo (Assistant) | Regulates Qi, prevents stagnation, awakens Spleen. |
| Sheng Ma | 6g | 8.7% | Zuo (Assistant) | — |
| Chai Hu | 6g | 8.7% | Zuo (Assistant) | — |
Total weight: 69g
Energetics dose-weighted
The formula's overall nature, taste balance and channel reach, weighted by each herb's dose. Classical formulas often pair warm and cool herbs on purpose, so a net figure summarises the mix — it doesn't describe every herb in it.
Nature
Net slightly warm (+0.52)
From 100% of the weighed grams.
Grams by band: cool 17%, neutral 13%, warm 70%.
Taste
- pungent 20%
- sweet 59%
- bitter 22%
From 100% of the weighed grams.
Channels reached
- Spleen 91%
- Lung 65%
- Heart 39%
- Stomach 35%
- Liver 22%
- Kidney 13%
Share of the grams entering each channel, from 100% of the weighed grams.
Dose-weighted from each herb's recorded nature, taste and channels (missing values are left out, never counted as neutral). It describes the composition — it is not a recommendation.
Preparation
Decoct in water 25–30 minutes. Take warm on empty stomach morning and evening.
Dosage
Decoction: 1 dose/day. Pills: 6–9g twice daily. Long-term use often required for prolapse.
Conditions Addressed
Relationships
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Formula Network
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Similar Formulas by composition
Match score combines dosage-weighted composition (cosine, 70%) with shared-herb overlap (Jaccard, 30%).
Traditional formula information is for educational purposes only. Herbal formulas should be prescribed by a qualified practitioner — dosages and combinations are individualized and can interact with medications.
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