Qing Wen Bai Du Yin

Clear Epidemics and Overcome Toxin Decoction · 清瘟敗毒飲

Also known as: Qingwen Baidu Decoction, Antipyretic and Antitoxic Decoction, Clear Pestilence and Defeat Toxin Decoction

A powerful Heat-clearing formula used for severe epidemic febrile diseases where intense Heat and toxic pathogens have invaded both the Qi and Blood levels of the body. It addresses dangerously high fever, delirium, skin rashes, and bleeding by simultaneously cooling the blood and draining fire. This is an emergency formula for critical, life-threatening heat conditions and is not intended for mild or cold-type illnesses.

Origin Yi Zhen Yi De (疫疹一得) by Yu Lin (余霖, courtesy name Shi Yu 師愚) — Qīng dynasty, 1794 CE
Composition 14 herbs
Shi Gao
King
Shi Gao
Shui Niu Jiao
King
Shui Niu Jiao
Shu Di Huang
Deputy
Shu Di Huang
Huang Lian
Deputy
Huang Lian
Zhi Mu
Deputy
Zhi Mu
Huang Qin
Assistant
Huang Qin
Zhi Zi
Assistant
Zhi Zi
Chi Shao
Assistant
Chi Shao
+6
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Educational content Consult qualified TCM practitioners for diagnosis and treatment

Patterns Addressed

In TCM, symptoms don't appear randomly — they cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Qing Wen Bai Du Yin is designed to correct these specific patterns.

Why Qing Wen Bai Du Yin addresses this pattern

This is the primary pattern this formula was designed to treat. In the Four-Level (Wei-Qi-Ying-Xue) diagnostic framework used for febrile diseases, Heat that has penetrated to both the Qi level and the Blood level simultaneously creates a dangerous condition called "Qi and Blood both ablaze" (气血两燔). The Qi-level Heat manifests as extreme fever, intense thirst, and profuse sweating, while the Blood-level Heat causes skin rashes (macules), bleeding from multiple sites, and delirium. The formula addresses this by deploying Shi Gao with Zhi Mu and Gan Cao to clear the Qi level, Shui Niu Jiao with Sheng Di Huang, Chi Shao and Mu Dan Pi to cool the Blood level, and Huang Lian, Huang Qin and Zhi Zi to drain toxic fire from all three Burners.

A practitioner would look for one or more of these signs

High Fever

Dangerously high fever unresponsive to ordinary treatment

Excessive Thirst

Extreme thirst with desire to drink large amounts

Delirium

Delirious speech, confusion or loss of consciousness

Skin Rashes

Dark red or purple skin rashes (macules)

Nosebleeds

Nosebleeds or bleeding from multiple sites

Headaches

Splitting headache described as 'head-splitting'

Nausea

Dry heaving and vomiting

Irritability

Extreme agitation and restlessness

Commonly Prescribed For

These conditions can arise from the patterns above. A practitioner would consider Qing Wen Bai Du Yin when these conditions are specifically caused by those patterns — not for all cases of these conditions.

Arises from: Qi Level and Blood Level Heat Epidemic Toxic Heat

TCM Interpretation

In TCM, sepsis corresponds to a situation where virulent toxic Heat has penetrated deep into the body, invading both the Qi and Blood levels. The intense systemic inflammation is understood as fire toxin (火毒) blazing through the Yangming (Stomach and Intestines), the Heart (causing delirium and altered consciousness), and the Blood vessels (causing hemorrhage and disseminated intravascular coagulation). The body's protective Qi is overwhelmed, fluids are being consumed, and without intervention the vital Yin is destroyed.

Why Qing Wen Bai Du Yin Helps

Qing Wen Bai Du Yin matches the sepsis presentation because it simultaneously clears the overwhelming Qi-level Heat (the systemic inflammatory fire) with massive doses of Shi Gao, drains toxic fire from all three Burners with Huang Lian, Huang Qin and Zhi Zi, and cools the Blood to address hemorrhagic complications with Shui Niu Jiao, Sheng Di Huang, Chi Shao and Mu Dan Pi. Modern research has shown this formula has significant antipyretic effects, antagonizes platelet aggregation, reduces blood viscosity, and lowers inflammatory mediators like TNF-alpha while raising anti-inflammatory IL-10 levels.

Also commonly used for

Meningitis

Epidemic cerebrospinal meningitis with severe Heat signs

Measles

Severe measles with high fever and hemorrhagic complications

Scarlet Fever

With intense Heat toxin and skin eruptions

Hemorrhagic Fevers

Epidemic hemorrhagic fever during febrile phase

Psoriasis

Erythrodermic psoriasis with Blood-Heat pattern

Pneumonia

Severe infectious pneumonia with high fever and toxicity

Typhoid And Paratyphoid Fever

Drug-resistant typhoid with persistent high fever

Hand Foot and Mouth Disease

Severe cases in children with high fever

What This Formula Does

Every TCM formula has a specific set of actions — here's what Qing Wen Bai Du Yin does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Qing Wen Bai Du Yin is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Qing Wen Bai Du Yin performs to restore balance in the body:

How It Addresses the Root Cause

TCM doesn't just suppress symptoms — it aims to resolve the underlying imbalance. Here's how Qing Wen Bai Du Yin works at the root level.

Qing Wen Bai Du Yin addresses what TCM calls "Qi and Blood level burning" (气血两燔, qì xuè liǎng fán), a critical stage of epidemic febrile disease where intense Heat-toxin has penetrated to the deepest levels of the body simultaneously. The word "燔" literally means "to burn" or "to scorch," conveying just how fierce this Heat is.

In normal epidemic febrile disease, Heat enters the body in stages: first the exterior (Wei level), then the Qi level (affecting organ function), then the Ying/Blood levels (affecting the blood and consciousness). In this pattern, however, the toxic Heat is so overwhelming that it blazes through the Qi and Blood levels at the same time. At the Qi level, the pathogenic Heat scorches the Stomach and Lungs, causing extreme fever, raging thirst, drenching sweat, and a forceful pulse. At the Blood level, Heat agitates the blood and disturbs the Heart and Pericardium, causing delirium, loss of consciousness, skin rashes (macules), nosebleeds, vomiting of blood, and a deep crimson tongue. Body fluids are being rapidly consumed, and the Yin is on the verge of collapse.

Because the toxic Heat occupies both levels simultaneously, a treatment that only addresses one level will fail. The formula must simultaneously clear blazing Heat from the Qi level (especially the Yangming/Stomach system), cool and stabilize the Blood to stop hemorrhaging and calm the spirit, and rescue the body's Yin fluids before they are completely consumed. This is why Yu Shi Yu combined three powerful classical strategies into a single prescription.

Formula Properties

Every formula has an inherent temperature, taste, and affinity for specific organs — these properties determine how it interacts with the body

Overall Temperature

Cold

Taste Profile

Predominantly bitter and sweet with a pungent quality. Bitter to drain Fire and dry Dampness, sweet to protect fluids and moderate the harsh cold, and pungent (from Shi Gao) to disperse and release trapped Heat outward.

Channels Entered

Ingredients

14 herbs

The herbs that make up Qing Wen Bai Du Yin, organized by their role in the prescription

King — Main ingredient driving the formula
Deputy — Assists and enhances the King
Assistant — Supports or moderates other herbs
Envoy — Directs the formula to its target
Kings — Main ingredient driving the formula
Shi Gao

Shi Gao

Gypsum

Dosage 60 - 240g
Temperature Cold
Taste Acrid / Pungent (辛 xīn), Sweet (甘 gān)
Organ Affinity Lungs, Stomach
Preparation Decoct first for 15-20 minutes before adding other herbs (先煎)

Role in Qing Wen Bai Du Yin

Used in very large doses to powerfully clear blazing Heat from the Qi level, especially Yangming (Stomach) Heat. As the Stomach is the source of Qi and Blood for all twelve channels, clearing Stomach Heat extinguishes fire across the entire body.
Shui Niu Jiao

Shui Niu Jiao

Water buffalo horn

Dosage 15 - 30g (Shui Niu Jiao); historically Xi Jiao 6 - 12g
Temperature Cold
Taste Bitter (苦 kǔ), Salty (咸 xián)
Organ Affinity Heart, Liver, Stomach
Preparation Ground into powder and stirred into the strained decoction (磨汁冲服), or decocted first separately (先煎)

Role in Qing Wen Bai Du Yin

Enters the Blood level to cool Blood, resolve toxins, and clear Heart Heat. Works in tandem with Shi Gao to address both Qi-level and Blood-level Heat simultaneously. Historically Xi Jiao (Rhinoceros Horn) was used; Shui Niu Jiao is the modern ethical substitute at higher dosage.
Deputies — Assists and enhances the King
Shu Di Huang

Shu Di Huang

Prepared Rehmannia root

Dosage 9 - 30g
Temperature Slightly Warm
Taste Sweet (甘 gān)
Organ Affinity Liver, Kidneys

Role in Qing Wen Bai Du Yin

Cools the Blood, nourishes Yin, and generates fluids. Supports Shui Niu Jiao in clearing Blood-level Heat while protecting the body fluids that are being consumed by the intense fire.
Huang Lian

Huang Lian

Coptis rhizome

Dosage 6 - 12g
Temperature Cold
Taste Bitter (苦 kǔ)
Organ Affinity Heart, Liver, Stomach, Large Intestine, Gallbladder, Spleen

Role in Qing Wen Bai Du Yin

Drains fire from the Heart and Middle Burner, clears Heat and resolves toxicity. Part of the Huang Lian Jie Du Tang grouping within this formula that purges fire from all three Burners.
Zhi Mu

Zhi Mu

Anemarrhena rhizome

Dosage 6 - 12g
Temperature Cold
Taste Bitter (苦 kǔ), Sweet (甘 gān)
Organ Affinity Lungs, Stomach, Kidneys

Role in Qing Wen Bai Du Yin

Assists Shi Gao in clearing Qi-level Heat from the Lung and Stomach, while nourishing Yin and generating fluids to protect against fluid loss from extreme Heat.
Assistants — Supports or moderates other herbs
Huang Qin

Huang Qin

Chinese skullcap root

Dosage 6 - 9g
Temperature Cold
Taste Bitter (苦 kǔ)
Organ Affinity Lungs, Gallbladder, Spleen, Large Intestine, Small Intestine, Heart, Stomach

Role in Qing Wen Bai Du Yin

Clears Heat from the Upper Burner, particularly Lung Heat. Combines with Huang Lian and Zhi Zi to drain fire across all three Burners.
Zhi Zi

Zhi Zi

Gardenia fruit

Dosage 6 - 9g
Temperature Cold
Taste Bitter (苦 kǔ)
Organ Affinity Heart, Lungs, San Jiao (Triple Burner)

Role in Qing Wen Bai Du Yin

Clears Heat from all three Burners and drains it downward through the urine. Particularly effective for clearing Heart fire and resolving irritability and restlessness.
Chi Shao

Chi Shao

Red peony root

Dosage 6 - 9g
Temperature Slightly Cool
Taste Bitter (苦 kǔ), Sour (酸 suān)
Organ Affinity Liver

Role in Qing Wen Bai Du Yin

Cools the Blood, clears Blood-level Heat, and invigorates Blood circulation to dispel Blood stasis caused by Heat scorching the Blood vessels.
Mu Dan Pi

Mu Dan Pi

Tree peony root bark

Dosage 6 - 9g
Temperature Slightly Cool
Taste Bitter (苦 kǔ), Acrid / Pungent (辛 xīn)
Organ Affinity Heart, Liver, Kidneys

Role in Qing Wen Bai Du Yin

Cools the Blood and clears deficiency-type Heat. Works alongside Chi Shao in the Xi Jiao Di Huang Tang grouping to cool Blood and dispel stasis.
Xuan Shen

Xuan Shen

Ningpo figwort root

Dosage 6 - 12g
Temperature Cold
Taste Sweet (甘 gān), Bitter (苦 kǔ), Salty (咸 xián)
Organ Affinity Lungs, Stomach, Kidneys

Role in Qing Wen Bai Du Yin

Nourishes Yin, cools the Blood, drains fire, and resolves toxicity. Particularly effective for sore throat and protecting the fluids of the Kidney and Lung that are damaged by intense Heat.
Lian Qiao

Lian Qiao

Forsythia fruit

Dosage 6 - 12g
Temperature Slightly Cool
Taste Bitter (苦 kǔ)
Organ Affinity Lungs, Heart, Small Intestine

Role in Qing Wen Bai Du Yin

Clears Heat and resolves toxicity, disperses clumped Heat, and vents pathogenic Heat outward. Its light, ascending nature helps clear Heat from the Upper Burner.
Envoys — Directs the formula to its target
Dan Zhu Ye

Dan Zhu Ye

Lophatherum

Dosage 3 - 6g
Temperature Cold
Taste Sweet (甘 gān), Bland (淡 dàn)
Organ Affinity Heart, Stomach, Small Intestine

Role in Qing Wen Bai Du Yin

Clears Heart Heat and promotes urination, guiding Heat downward and out through the urine. Lightens the formula with its gentle, ascending-then-descending nature.
Jie Geng

Jie Geng

Platycodon root

Dosage 3 - 6g
Temperature Neutral
Taste Bitter (苦 kǔ), Acrid / Pungent (辛 xīn)
Organ Affinity Lungs

Role in Qing Wen Bai Du Yin

Opens the Lung, benefits the throat, and directs the formula's actions upward to the Upper Burner. Also helps expel toxic Heat from the chest and throat area.
Gan Cao

Gan Cao

Licorice root

Dosage 3 - 6g
Temperature Neutral
Taste Sweet (甘 gān)
Organ Affinity Heart, Lungs, Spleen, Stomach

Role in Qing Wen Bai Du Yin

Harmonizes the other herbs in the formula, clears Heat and resolves toxicity, and protects the Stomach from the large dose of cold, bitter herbs. Also works with Shi Gao and Zhi Mu as part of the Bai Hu Tang structure to preserve body fluids.

Why This Combination Works

How the herbs in Qing Wen Bai Du Yin complement each other

Overall strategy

This formula addresses a life-threatening situation where epidemic toxic Heat has invaded both the Qi level and Blood level simultaneously, a condition called "Qi and Blood both ablaze" (气血两燔). The treatment strategy must therefore clear Heat from both levels at once. Yu Lin achieved this by skillfully combining three classical formulas into one: Bai Hu Tang for Qi-level Heat, Xi Jiao Di Huang Tang for Blood-level Heat, and Huang Lian Jie Du Tang for toxic fire across all three Burners.

King herbs

Shi Gao is used in exceptionally large doses (up to 240g in the original large-dose tier) because it is the primary force for clearing intense Yangming (Stomach channel) Heat. Yu Lin reasoned that since the Stomach is the source from which all twelve channels receive their Qi and nourishment, clearing Stomach Heat extinguishes fire throughout the entire body. Shui Niu Jiao (Water Buffalo Horn) serves as the second King, entering the Blood level to cool Blood, clear Heart fire, and resolve deep-seated toxic Heat. Together these two Kings address the formula's core mission of clearing both Qi and Blood simultaneously.

Deputy herbs

Sheng Di Huang reinforces the Blood-cooling action of Shui Niu Jiao while nourishing Yin and generating fluids to counteract the severe fluid damage caused by extreme Heat. Huang Lian drains fire from the Heart and Stomach, acting as the core of the Huang Lian Jie Du Tang component. Zhi Mu partners with Shi Gao in the Bai Hu Tang structure, clearing Lung and Stomach Heat while preserving fluids.

Assistant herbs

Huang Qin and Zhi Zi join Huang Lian to form the three-herb core of Huang Lian Jie Du Tang, draining fire from the Upper, Middle, and Lower Burners respectively (reinforcing assistants). Chi Shao and Mu Dan Pi pair with Shui Niu Jiao and Sheng Di Huang to cool Blood and dispel the blood stasis that forms when Heat scorches the blood vessels (reinforcing assistants). Xuan Shen nourishes Yin and resolves toxicity, protecting the Kidney Yin from Heat damage while soothing an inflamed throat (reinforcing assistant). Lian Qiao clears Heat, resolves clumped toxicity, and helps vent pathogenic Heat outward (reinforcing assistant).

Envoy herbs

Dan Zhu Ye clears Heart Heat and promotes urination, guiding Heat downward and out through the urine. Jie Geng opens the Lung and directs the formula upward to the throat and Upper Burner. Gan Cao harmonizes all the herbs, moderates the intensely cold nature of the formula, and protects the Stomach from damage by the large doses of bitter, cold ingredients.

Notable synergies

Shi Gao paired with Zhi Mu (from Bai Hu Tang) clears Qi-level Heat while preserving fluids. Shui Niu Jiao paired with Sheng Di Huang (from Xi Jiao Di Huang Tang) cools Blood-level Heat while nourishing Yin. Zhi Zi paired with Dan Zhu Ye creates a downward-draining pathway that clears Heart fire and conducts Heat out through urination. Xuan Shen, Jie Geng, Lian Qiao and Gan Cao together form a sub-cluster that clears, moistens, and soothes an inflamed throat.

How to Prepare

Traditional preparation instructions for Qing Wen Bai Du Yin

First decoct Shi Gao (Gypsum) for 15 to 20 minutes until thoroughly dissolved, then add the remaining herbs and continue to decoct. Shui Niu Jiao (Water Buffalo Horn, the modern substitute for Xi Jiao) should be ground into powder and stirred into the strained decoction, or decocted first separately and the liquid added in. Divide into two doses and take warm.

The original text specifies three dosage tiers based on pulse condition: use the large dose when the pulse is submerged, thin and rapid (indicating severe internal Heat); use the medium dose when the pulse is submerged and rapid; use the small dose when the pulse is floating, large and rapid (indicating Heat still in the superficial level).

Common Modifications

How practitioners adapt Qing Wen Bai Du Yin for specific situations

Added
Da Qing Ye

9-15g, cools Blood and resolves toxin to clear rashes

Sheng Ma

1.2-1.5g only, small dose to vent toxin outward and raise the clear Yang

When rashes appear, adding Da Qing Ye strengthens the Blood-cooling and toxin-resolving action, while a very small dose of Sheng Ma helps vent the toxic pathogen outward through the skin rather than allowing it to sink deeper.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herbal formula.

Contraindications

Situations where Qing Wen Bai Du Yin should not be used or requires extra caution

Avoid

Yang Deficiency patterns. This is an extremely cold formula that can severely damage Yang Qi. It must never be used in patients with underlying Yang Deficiency, even if they present with some Heat signs.

Avoid

Spleen and Stomach Deficiency. The large doses of bitter-cold and sweet-cold herbs in this formula will further damage an already weakened digestive system, potentially causing severe diarrhea or collapse.

Caution

Exterior-stage febrile disease where Heat has not yet fully entered the Qi and Blood levels. Using this formula prematurely, before the pathogen has penetrated deeply, is excessive and may trap the pathogen or harm the body's Qi.

Caution

Patients with cold or deficiency constitutions who develop mild febrile illness. The formula's powerful cold nature is designed only for extreme Heat-toxin conditions and will cause harm in milder presentations.

Caution

Prolonged use beyond the acute crisis. Once the intense Heat has broken and symptoms are receding, the formula should be discontinued or significantly modified to avoid injuring Yin and Yang through excessive cold purging.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. This formula contains several herbs of concern: Mu Dan Pi (Moutan bark) and Chi Shao (Red Peony root) both invigorate blood circulation and have the potential to stimulate uterine activity. Zhi Zi (Gardenia) is also considered cautionary in pregnancy. The overall extremely cold nature of the formula poses additional risk of harming fetal development by severely depleting the mother's Yang Qi. This formula should only be considered in a pregnant patient if she is facing a life-threatening epidemic febrile crisis, and only under the direct supervision of an experienced practitioner who can weigh the immediate danger against reproductive risk.

Breastfeeding

Use with significant caution during breastfeeding. The formula's extremely cold nature and potent bitter-cold herbs (Huang Lian, Huang Qin, Zhi Zi) may transfer through breast milk and cause digestive upset or diarrhea in the nursing infant. Sheng Di Huang and Xuan Shen, being rich and cloying, may also affect milk quality. Additionally, prolonged use of such intensely cold herbs can weaken the mother's Spleen and Stomach function, potentially reducing milk production. This formula should only be used in breastfeeding women during acute febrile emergencies, for the shortest possible duration, and ideally with the option to temporarily suspend breastfeeding during treatment.

Children

Qing Wen Bai Du Yin has historical and modern clinical use in pediatric patients, particularly for childhood infectious diseases such as infantile pneumonia, hand-foot-mouth disease, and infectious mononucleosis. However, dosing must be carefully adjusted. Children's digestive systems are delicate, and the extremely cold, bitter nature of this formula can easily injure a child's Spleen and Stomach. Dosages should generally be reduced to one-third to one-half of adult doses depending on the child's age and weight, and the treatment course should be as short as possible. For infants and toddlers under 3 years old, use requires particular caution and close monitoring. The formula should be discontinued as soon as the acute Heat crisis resolves. A qualified practitioner experienced in pediatrics should manage the case.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Qing Wen Bai Du Yin

Gan Cao (Licorice root) in this formula may interact with several classes of pharmaceuticals. It can cause potassium loss and fluid retention, which may interfere with antihypertensive medications, diuretics (especially potassium-wasting types like furosemide), cardiac glycosides (e.g. digoxin, where hypokalemia increases toxicity risk), and corticosteroids (compounding potassium depletion and fluid retention).

The formula's strong blood-cooling and blood-moving properties (from Sheng Di Huang, Chi Shao, Mu Dan Pi, and water buffalo horn) may potentiate the effects of anticoagulant and antiplatelet medications (e.g. warfarin, heparin, aspirin, clopidogrel), increasing the risk of bleeding. Given that this formula is specifically indicated for conditions where bleeding may already be occurring, concurrent anticoagulant use requires very close monitoring.

Huang Lian (Coptis) contains berberine, which has documented interactions with cyclosporine (increased blood levels) and may affect the metabolism of drugs processed by cytochrome P450 enzymes. Berberine may also lower blood sugar, potentially enhancing the effects of hypoglycemic medications.

Usage Guidance

Practical advice for getting the most out of Qing Wen Bai Du Yin

Best time to take

Taken in divided doses, typically twice daily (morning and evening), on an empty or near-empty stomach for faster absorption during acute febrile crisis. Shi Gao should be pre-boiled for 15-20 minutes before adding the remaining herbs.

Typical duration

Acute emergency use: 1 to 5 days, discontinued or modified as soon as the fever breaks and critical symptoms resolve.

Dietary advice

During treatment, avoid all warming, greasy, and rich foods: no fried foods, lamb, beef, alcohol, spicy dishes (chili, ginger, garlic, pepper), or heavily seasoned meals. These will add Heat and counteract the formula's cooling effect. Also avoid sticky, hard-to-digest foods that burden the Spleen and Stomach, which is already stressed by the formula's cold nature. Light, easily digestible foods are best: thin rice porridge (congee), mung bean soup, fresh fruits like pear and watermelon (which also help clear Heat and generate fluids), and lightly cooked vegetables. Staying well hydrated is critical, as the underlying condition involves severe fluid depletion.

Qing Wen Bai Du Yin originates from Yi Zhen Yi De (疫疹一得) by Yu Lin (余霖, courtesy name Shi Yu 師愚) Qīng dynasty, 1794 CE

Classical Texts

Key passages from the classical Chinese medical texts that first described Qing Wen Bai Du Yin and its clinical use

《疫疹一得》(Yi Zhen Yi De) by Yu Shi Yu:

「此十二經泄火之藥也。斑疹雖出於胃,亦諸經之火有以助之。重用石膏直入胃經,使其敷佈於十二經,退其淫熱;佐以黃連、犀角、黃芩泄心肺火於上焦,丹皮、梔子、赤芍泄肝經之火,連翹、玄參解散浮游之火,生地、知母抑陽扶陰,泄其亢甚之火,而救欲絕之水,桔梗、竹葉載藥上行,使以甘草和胃也。此皆大寒解毒之劑,故重用石膏,先平甚者,而諸經之火自無不安矣。」

"This is a formula that drains Fire from all twelve channels. Although rashes emerge from the Stomach, the Fire of all the other channels contributes to them. Shi Gao (Gypsum) is used in heavy dosage to enter the Stomach channel directly, spreading its action across all twelve channels to clear the rampant Heat. Huang Lian, Xi Jiao, and Huang Qin assist by draining Heart and Lung Fire from the upper burner. Mu Dan Pi, Zhi Zi, and Chi Shao drain Liver channel Fire. Lian Qiao and Xuan Shen disperse wandering Fire. Sheng Di and Zhi Mu restrain Yang and support Yin, draining the extreme excess of Fire and rescuing the Water that is on the verge of exhaustion. Jie Geng and Zhu Ye carry the other herbs upward, while Gan Cao harmonizes the Stomach. This is entirely a formula of extreme cold that resolves toxin. Therefore, Shi Gao is used in large amounts to first subdue the most severe Fire, and then the Fire of all the channels naturally settles."

Yu Shi Yu also stated:

「非石膏不足以治熱疫。」

"Without Shi Gao (Gypsum), it is insufficient to treat Heat epidemics."

Historical Context

How Qing Wen Bai Du Yin evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

Qing Wen Bai Du Yin was created by Yu Lin (余霖), courtesy name Shi Yu (师愚), a physician from Tongcheng, Anhui province during the Qing Dynasty. Yu Shi Yu was originally a Confucian scholar who turned to medicine after his father died of epidemic disease, a tragedy he attributed to the mishandling of the illness by other physicians. He devoted decades to studying epidemic febrile diseases and wrote his insights into the book Yi Zhen Yi De (《疫疹一得》, "A View of Epidemic Febrile Diseases with Rashes"), published in 1794.

In 1793, a devastating epidemic swept through the capital Beijing. Most physicians of the day treated febrile epidemics using Shang Han Lun (Cold Damage) methods, employing warm-acrid formulas that were entirely inappropriate for Heat-toxin conditions. Yu Shi Yu boldly used massive doses of cold Shi Gao (Gypsum) as the centerpiece of his treatment, achieving remarkable success. His fame spread rapidly after he cured the family of a government official surnamed Feng, and the story was later recorded by the famous scholar Ji Xiaolan in his Yuewei Caotang Biji (《阅微草堂笔记》). Yu Shi Yu was so confident in his methods that he reportedly declared of his prescriptions: "Take them and live; refuse them and die." Patients who could not obtain a personal consultation reportedly collected his used herb dregs, re-boiled them, and drank the resulting tea with reported benefit.

The formula's genius lies in combining three established classical formulas: Bai Hu Tang (White Tiger Decoction) for Qi-level Heat, Xi Jiao Di Huang Tang (Rhinoceros Horn and Rehmannia Decoction) for Blood-level Heat, and Huang Lian Jie Du Tang (Coptis Decoction to Resolve Toxicity) for Fire-toxin across the Triple Burner. In the modern era, Qing Wen Bai Du Yin was recommended in China's national treatment guidelines during the COVID-19 pandemic for severe-stage cases, continuing its centuries-old role as a frontline formula against epidemic disease.

Modern Research

5 published studies investigating the pharmacological effects or clinical outcomes of Qing Wen Bai Du Yin

1

Potential therapeutic effect of Qingwen Baidu Decoction against Corona Virus Disease 2019: a mini review (2020)

Wen J, Wang R, Liu H, Tong Y, Wei S, Zhou X, Li H, Jing M, Wang M, Zhao Y. Chinese Medicine, 2020, 15:48.

This review summarized pharmacological research and clinical applications of the formula across multiple diseases. The authors found that the formula demonstrates anti-inflammatory, antiviral, antibacterial, immunomodulatory, and antipyretic effects. It has been used clinically in treating sepsis, epidemic hemorrhagic fever, cerebrospinal meningitis, infantile pneumonia, and epidemic encephalitis B, and was recommended in China's national COVID-19 treatment guidelines for severe cases.

2

Anti-inflammatory effect of Qingwen Baidu Decoction in sepsis rats (Animal study, 2014)

Yu ZM, Liu ZH, Chen J, Zeng Q. Chinese Journal of Integrative Medicine, 2014, 20(12):934-943.

This preclinical study explored the anti-inflammatory mechanisms of the formula in a lipopolysaccharide-induced sepsis rat model. Rats treated with the formula showed significant changes in inflammatory mediators compared to controls, demonstrating that the decoction exerts its anti-inflammatory effect by modulating the levels of multiple inflammatory mediators relevant to sepsis pathology.

3

Bioactive Components from Qingwen Baidu Decoction against LPS-Induced Acute Lung Injury in Rats (Preclinical, 2017)

Zhang Q, Lei HM, Wang PL, Ma ZQ, Zhang Y, Wu JJ, Nie J, Chen SJ, Han WJ, Wang Q, Chen DY, Cai CK, Li Q. Molecules, 2017, 22(5):692.

Researchers investigated which chemical constituents of the formula are responsible for its anti-inflammatory effects in a rat model of acute lung injury. High and middle doses of the formula significantly reduced inflammation and pulmonary edema. Using HPLC chromatography and principal component analysis, the study identified key bioactive components responsible for the therapeutic effects.

4

Qinwen Baidu Decoction for Sepsis: A Protocol for a Systematic Review and Meta-analysis (Protocol, 2019)

Wang P, Huang H, Chen R, Li R, Luo Z, Huang Q, Chen W. Medicine (Baltimore), 2019, 98(9):e14761.

This published protocol outlined a planned systematic review and meta-analysis to evaluate the effectiveness and safety of the formula for treating sepsis. The authors noted that the decoction has been widely applied in sepsis treatment across multiple Chinese RCTs, but acknowledged that these trials are generally of low methodological quality. The protocol aimed to synthesize evidence on outcomes including 28-day mortality, APACHE-II scores, inflammatory markers, and ICU stay duration.

5

Holistic quality evaluation of Qingwen Baidu Decoction and its anti-inflammatory effects (Preclinical, 2020)

Zheng Y, Tian C, Fan C, Xu N, Xiao J, Zhao X, Lu Z, Cao H, Liu J, Yu L. Journal of Ethnopharmacology, 2021, 267:113497.

This study was the first to describe the full chemical profile of the formula and investigate its possible anti-inflammatory mechanisms. The researchers identified multiple active compounds and demonstrated that the formula suppresses inflammation through multiple pathways, providing a scientific basis for quality control and supporting its clinical use in inflammation-related diseases.

Research on TCM formulas is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.