Ba Zheng San
Star八正散 (Eight Herb Powder for Rectification)
Source: Tai Ping Hui Min He Ji Ju Fang (Song, 1107)
Last updated July 22, 2026
Description
Ba Zheng San (Eight Herb Powder for Rectification) is the primary formula for lower burner damp-heat causing difficult or painful urination. It clears heat, drains dampness, and unblocks urinary difficulty through an ensemble of herbs with diuretic and heat-clearing properties. Clinically essential for urinary tract infections, kidney stones, and urethritis.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
|
Mu Tong
Use Chuan Mu Tong (Clematis armandii). Guan Mu Tong (Aristolochia) is nephrotoxic and must not be substituted.
|
9g | 13.04% | Jun (Chief) | Clears heat, promotes urination, unblocks painful urinary dribbling |
|
Hua Shi
Decoct in cloth bag.
|
9g | 13.04% | Jun (Chief) | Clears damp-heat and promotes urination, eases painful urination |
| Qu Mai | 9g | 13.04% | Chen (Deputy) | Clears damp-heat, unblocks painful urinary dribbling, invigorates blood |
| Bian Xu | 9g | 13.04% | Chen (Deputy) | Clears damp-heat from the Bladder, promotes urination |
|
Che Qian Zi
Decoct in cloth bag.
|
9g | 13.04% | Chen (Deputy) | Clears damp-heat, promotes urination without injuring fluids |
| Zhi Zi | 9g | 13.04% | Zuo (Assistant) | Clears heat from all three burners, guides damp-heat downward |
| Da Huang | 6g | 8.7% | Zuo (Assistant) | Drains heat downward through the stool |
| Gan Cao | 6g | 8.7% | Shi (Envoy) | Harmonizes the formula and moderates urethral pain |
| Deng Xin Cao | 3g | 4.35% | Shi (Envoy) | Guides heat downward and promotes urination |
Total weight: 72g
Preparation
Traditionally as powder taken with rush pith decoction. As decoction: simmer 20 minutes, take cool.
Dosage
Powder: 6–9g 3x/day with rush pith (Deng Xin Cao) decoction. Decoction: 1 dose/day. Short course — discontinue when symptoms resolve.
Conditions Addressed
Related Formulas
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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