San Ren Tang
Star三仁汤 (Three Seeds Decoction)
Source: Wen Bing Tiao Bian (Systematic Differentiation of Warm Diseases) — Wu Jutong (Qing, 1798)
Last updated July 22, 2026
Description
San Ren Tang (Three Seeds Decoction) is the primary formula for damp-warmth (damp-heat) in the upper and middle burners presenting in the early stage. Named for its three seed herbs (Yi Yi Ren, Bai Dou Kou, and Xing Ren), it opens the Lung, transforms dampness in the middle burner, and promotes urination to drain dampness downward. It is essential for treating the early stage of damp-heat febrile diseases.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
| Xing Ren | 15g | 17.86% | Jun (Chief) | Opens and directs Lung qi downward — frees the upper burner |
| Bai Dou Kou | 6g | 7.14% | Jun (Chief) | Aromatically transforms dampness and revives the middle burner |
| Yi Yi Ren | 18g | 21.43% | Jun (Chief) | Bland; leaches damp-heat out through the lower burner |
|
Hua Shi
Decoct in cloth bag.
|
18g | 21.43% | Chen (Deputy) | Clears damp-heat and promotes urination |
| Tong Cao | 6g | 7.14% | Chen (Deputy) | Bland; clears heat and promotes urination |
| Dan Zhu Ye | 6g | 7.14% | Chen (Deputy) | Clears heat and promotes urination |
| Ban Xia | 9g | 10.71% | Zuo (Assistant) | Dries dampness, harmonizes the middle, directs qi downward |
| Hou Po | 6g | 7.14% | Zuo (Assistant) | Moves qi and dries dampness, relieves fullness |
Total weight: 60g
Preparation
Decoct all herbs in water for 20–25 minutes. Take cool. Add Hou Po last 10 minutes.
Dosage
Decoction: 1–2 doses/day. Take at room temperature or cool. For febrile conditions, may take more frequently.
Conditions Addressed
Related Formulas
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.
📝 Notes
Public notes from the community and your own private notes on San Ren Tang.
No notes yet.