Ba Zheng San
Classical TCM Formula Profile
Part of the HJMEDICAL TCM Discovery Center
八正散 · Bā Zhèng Sàn
A classical formula for damp-heat lin syndrome with frequent, urgent, painful urination, dark urine, dry mouth and a yellow greasy tongue coating.
Read the complete guide →Quick Facts
- Formula Category
- Heat-Clearing Formulas
- Primary Pattern
- Damp-Heat
- Primary Function
- Clear heat, drain damp, promote urination, unblock lin
- Primary Therapeutic Principle
- Drain damp-heat from the Lower Jiao and relieve painful urinary dysfunction
- Classical Source
- Tai Ping Hui Min He Ji Ju Fang (Song dynasty)
- Available as Granules
- Yes
Formula Overview
A classical formula for damp-heat lin syndrome with frequent, urgent, painful urination, dark urine, dry mouth and a yellow greasy tongue coating.
Therapeutic Principle
Traditionally selected for classic damp-heat lin with burning pain and dark urine — pure Lower Jiao clearing rather than Blood-cooling or Heart/Liver-focused approaches.
Composition: Sovereign, Minister, Assistant, Envoy
Every herb in the formula, grouped by the job it does in the classical hierarchy.
君SovereignTreats the main pattern
臣MinisterReinforces the sovereign
萹蓄Bian Xu9g
Knotweed- clears heat
- promotes urination and relieves strangury
滑石Hua Shi15g
Talcum- effective for lubricating the orifices and passages
- clears heat and percolates dampness
- promotes urination and relieves strangury
佐AssistantTreats accompanying patterns
梔子Zhi Zi9g
Gardenia Fruit- clears and reduces fire in the sanjiao dredges the water passages
木通Mu Tong6g
Akebia Stem- clears heart fire in the upper jiao removes damp-heat in the and lowers jiao
大黃Da Huang6g
Rhubarb Root and Rhizome- clears heat
Classical Composition
- Plantaginis Semen (Che Qian Zi) 1 jin (500g)
- Dianthi Herba (Qu Mai) 1 jin (500g)
- Polygoni Avicularis Herba (Bian Xu) 1 jin (500g)
- Talcum (Hua Shi) 1 jin (500g)
- Gardeniae Fructus (Zhi Zi) 1 jin (500g)
- Glycyrrhizae Radix et Rhizoma Praeparata cum Melle (Zhi Gan Cao) 1 jin (500g)
- Akebiae Caulis (Mu Tong) 1 jin (500g)
- Rhei Radix et Rhizoma (Da Huang) 1 jin (500g)
Dosages follow the classical source and are shown for study, not as a prescription.
Related Conditions
Related Health Topics
Actions
- Clears heat and subdues fire
- promotes urination
- and relieves strangury.
Indications
- Ba Zheng San is indicated for damp-heat strangury.
- The symptoms are frequent urgent urination, odynuria, dribbling urination, dark yellow urine, retention of urine in severe cases, cramps and fullness of abdomen, and a dry mouth and throat.
Tongue & pulseThe coating is yellow and greasy and the pulse is slippery and rapid.
Traditional Pathogenesis
Cause & mechanism
- This pattern is caused by damp-heat pouring downward into the bladder.
- Damp-heat accumulation in the bladder blocks the water passages and leads to frequent and urgent urination, odynuria, dysuria, and retention of urine.
- Damp-heat steams the urine causing it to become dark and turbid.
- Qi movement is blocked by damp-heat manifesting cramps and fullness of the abdomen.
- The distribution of fluid is blocked by damp-heat which leads to a dry mouth and throat.
Treatment strategy
- The therapeutic principle is to clear heat, promote urination, and relieve strangury.
How does this formula compare?
Clinical Perspective
Ba Zheng San drains Lower Jiao damp-heat for painful urination. Xiao Ji Yin Zi cools Blood for bloody lin. Dao Chi San clears Heart fire. Long Dan Xie Gan Tang drains Liver-Gallbladder damp-heat.
Clinical Differentiation
- Ba Zheng San is a common formula applied to strangury due to damp-heat.
- This clinical pattern is marked by frequent and urgent urination, odynuria, yellow and greasy tongue coating, slippery and rapid pulse.
Safety notes: This formula is bitter, cold and draining. It is not appropriate for deficiency-cold lin or for prolonged use in weak constitutions.
For educational reference only, based on traditional pattern differentiation — not a substitute for professional advice.
Frequently Asked Questions
What are the actions of Ba Zheng San?
Ba Zheng San has the actions of clearing Heat, draining Fire, promoting urination, and unblocking painful urinary dysfunction (Lin syndrome). It is the classic formula for Damp-Heat accumulating in the Lower Burner and Bladder.
Which modern diseases is Ba Zheng San suited to?
Modern TCM clinical practice commonly applies it to individuals whose pattern differentiation falls within Damp-Heat in the Lower Burner, including acute cystitis, urethritis, acute prostatitis, urinary tract stones with Heat signs, pyelonephritis of Damp-Heat type, and certain cases of postoperative or postpartum urinary retention.
Is Ba Zheng San suitable for improving frequent, urgent, burning, and painful urination with dark urine?
For presentations of frequent and urgent urination, burning pain on urination, scanty dark or turbid (sometimes bloody) urine, dribbling or difficulty urinating, lower abdominal fullness or discomfort, dry mouth, a yellow greasy tongue coating, and a slippery rapid pulse — in those whose pattern differentiation confirms Damp-Heat in the Bladder — TCM commonly applies Ba Zheng San as an adjunct. It cannot replace standard medical treatment of urinary tract infections or related conditions.
Related Products
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Related Articles
Ba Zheng San: Classic TCM Formula for Damp-Heat in the Lower Burner, Painful Urination & Lin Syndrome
Xiao Ji Yin Zi: Classic TCM Formula for Bloody Urine, Heat in the Blood & Lin Syndrome
Long Dan Xie Gan Tang: Classic TCM Formula for Liver-Gallbladder Damp-Heat, Irritability & Hypochondriac Pain
Dao Chi San: Classic TCM Formula for Heart Fire, Mouth Sores, Irritability & Painful Urination
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Medical Disclaimer
For general TCM education only — not medical advice. Consult a qualified TCM practitioner or licensed healthcare provider before use, especially if pregnant, nursing, on medication, or managing a chronic condition.