Si Jun Zi Tang
Star四君子汤 (Four Gentlemen Decoction)
Source: Tai Ping Hui Min He Ji Ju Fang (Song, 1107)
Last updated July 22, 2026
Description
Si Jun Zi Tang (Four Gentlemen Decoction) is the foundational formula for tonifying Spleen and Stomach Qi. Its four herbs — Ren Shen, Bai Zhu, Fu Ling, Gan Cao — gently yet effectively strengthen the middle burner. As the basis for dozens of derivative formulas, it is essential in TCM for all patterns rooted in Spleen Qi deficiency.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
| Ren Shen | 9g | 27.27% | Jun (Chief) | Powerfully tonifies Yuan Qi, benefits Spleen and Stomach. |
| Bai Zhu | 9g | 27.27% | Chen (Deputy) | Tonifies Spleen Qi, dries dampness, strengthens middle burner. |
| Fu Ling | 9g | 27.27% | Zuo (Assistant) | Drains dampness through leaching, supports Spleen Qi. |
| Gan Cao | 6g | 18.18% | Shi (Envoy) | Tonifies Qi, harmonizes all herbs in the formula. |
Total weight: 36g
Preparation
Decoct all herbs in water for 20–30 minutes. Take warm in 2 doses/day.
Dosage
Decoction: 1 dose/day. Pills: 6–9g twice daily. May be taken long-term.
Conditions Addressed
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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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