白虎汤的核心功效与机制是什么？

白虎汤由生石膏、知母、甘草与粳米四味经典中药精密配伍而成，核心功效为清热生津、消烦止渴。方中石膏辛甘大寒，直清胃腑与气分炽盛之实热；知母苦寒质润，滋阴润燥；粳米、炙甘草甘缓和中，保护胃黏膜并延长清热时间。方药通过苦寒直折与甘寒养阴，强力扑灭体内实热伤津重证。

现代医学中，白虎汤主要应用于哪些疾病？

现代临床和药理研究表明，白虎汤广泛用于治疗大热高烧（肺炎、流感爆发期）、重症中暑（热射病）、2型糖尿病、急性牙周炎、脑炎高热期及放射性皮炎。针对典型阳明气分热盛、气津两伤症状，本方能调节体温中枢、抑制炎性风暴、纠正水电解质紊乱并协助降血糖。建议专业医师辨证诊断后使用。

服用白虎汤有哪些严格的辨证禁忌？

白虎汤药性极度大寒清泄，严禁用于外感风寒初起未化热（怕冷、无汗）、真寒假热、阴虚虚热及脾胃虚寒泄泻者。盲用可致胃气受损、剧烈腹痛、呕吐及脱水。孕妇、哺乳期妇女、婴幼儿及高龄体弱者必须禁用。用药应中病即止，热退汗止后应立即停药，禁止长期服用。

Heat-Clearing Formulas

白虎湯 · Bái Hǔ Tāng

Bai Hu Tang

The foundational classical formula for Yangming Qi-aspect heat with high fever, profuse sweating and intense thirst.

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Last reviewed August 2026

Formula CategoryHeat-Clearing Formulas

Primary PatternStomach Heat

Primary FunctionClear Qi-aspect heat, generate fluids, stop thirst

Primary Therapeutic PrincipleClear Yangming Qi-aspect heat and generate fluids

Main HerbsGypsum · Anemarrhena Rhizome · Licorice Root · Non-glutinous Rice

Classical SourceShang Han Lun (Zhang Zhongjing, Eastern Han)

Why This Formula?

Traditionally selected when Yangming Qi-aspect heat is full — high fever, profuse sweat, intense thirst, flooding pulse — rather than residual heat, fire toxin, or exterior patterns.

Overview

What Is Bai Hu Tang?

1. Recorded in the Classical Literature

Bai Hu Tang (白虎汤), or White Tiger Decoction, is a classical formula from Zhang Zhongjing’s Shang Han Lun (Treatise on Cold Damage). It belongs to the category of formulas that clear Heat from the Qi level.

This formula addresses blazing Yangming channel Heat, in which intense Heat floods the Qi level without yet forming dry-hard stools in the Intestines. Typical signs include high fever, profuse sweating, intense thirst with a desire for cold drinks, a red face, irritability, a flooding large and forceful pulse, and a red tongue with dry yellow coating—the classic “four bigs” of Heat exuberance.

Combining Shi Gao as the chief herb to powerfully clear Heat, drain Fire, and generate fluids, Zhi Mu to clear Heat from the Lungs and Stomach while moistening dryness and protecting Yin, Jing Mi (non-glutinous rice) to nourish the Stomach and prevent the cold herbs from injuring the Middle, and Zhi Gan Cao to tonify Qi and harmonize, Bai Hu Tang effectively clears exuberant Qi-level Heat, generates fluids, and relieves the high fever and thirst of the White Tiger pattern.

Bai Hu Tang: Clearing Heat, Generating Fluids, Relieving Vexation and Quenching Thirst — Precise Resolution of High Fever, Heatstroke, and Type 2 Diabetes Deficiency-Fire Crises | HJMEDICAL

2. Infectious Diseases

When to use: Bai Hu Tang is often utilized for infectious diseases like the flu or pneumonia, specifically when they present with severe heat symptoms (such as a stubbornly high fever, intense thirst, heavy sweating, and a strong pulse).
How it helps: For a severe flu with a persistent fever, body aches, and restlessness, this formula acts quickly to clear the internal fire, offering significant relief from the intense discomfort.

3. Heatstroke

When to use: It is a classic and highly effective approach for severe heatstroke.
How it helps: When someone is suffering from a high fever, extreme fatigue, and profuse sweating due to heatstroke, this formula directly addresses the root problem by cooling the body down and replenishing the massive amount of fluids lost.

4. Other Conditions

Beyond acute fevers, Bai Hu Tang can be adapted by practitioners to treat other conditions that show signs of extreme internal heat:

Endocrine issues: It can help manage symptoms like excessive sweating and high body heat associated with conditions like hyperthyroidism.
Skin conditions: It is sometimes used for acute hives (urticaria) that are accompanied by severe itching and a fever, provided the underlying TCM pattern matches "qi-aspect exuberant heat."

How It Works

Herb Composition (Sovereign / Minister / Assistant / Envoy)

1. Chief Herb — Shi Gao

What it is: Shi Gao (Gypsum) is the star player of Bai Hu Tang. It has an intensely cold nature and a sweet, acrid flavor, specifically targeting the lung and stomach channels.
Its role: It is a heavy-duty herb used for clearing out extreme heat, draining fire, and stopping intense thirst. Because of its strong cooling power, it is used in large doses to quickly bring down high fevers and relieve severe dehydration.

2. Deputy Herb — Zhi Mu

What it is: Zhi Mu is bitter, sweet, and cold. It enters the lung, stomach, and kidney channels.
Its role: It works side-by-side with Shi Gao to clear heat, but it also has a special ability to nourish "yin" (the body's cooling and moisturizing fluids).
The teamwork: Zhi Mu prevents the extreme coldness of Shi Gao from drying out the body too much. Together, they clear the heat safely without damaging the body's essential energy.

3. Assistant Herbs — Jing Mi and Zhi Gan Cao

What they are: Jing Mi (Japonica Rice) and Zhi Gan Cao (Honey-Fried Licorice) act as the supporting cast to protect your digestion.
Jing Mi: Helps protect the stomach and generate fluids. It acts as a buffer so the intense cold of the main herbs doesn't upset your stomach.
Zhi Gan Cao: Boosts your vital energy (Qi) and harmonizes all the herbs in the formula so they work smoothly together without clashing.

4. Envoy Herb — None

Why none? Bai Hu Tang doesn't actually have a designated "envoy" herb (an herb that guides the medicine to a specific body part). The ingredients are already so effective at targeting the exact site of the disease that they don't need an extra guide to get the job done.

Symptoms Traditionally Associated

Clinical Presentation in TCM

1. Pathomechanism (How the Illness Works)

The root cause: This formula treats a condition TCM calls "exuberant heat in the Yang Ming Qi aspect." This happens when an external illness moves deep into the body and transforms into intense internal heat.
The symptoms' origin: Because the heat is trapped inside, the body fights back hard. The heat scorches your internal fluids, which leads to heavy sweating and extreme thirst. It can also disturb your internal balance, making you feel restless with a flushed, red face and a very strong pulse.

2. Actions (What the Formula Does)

Clears Heat and Drains Fire: Shi Gao and Zhi Mu act like a fire extinguisher for the intense internal heat.
Boosts Qi and Generates Fluids: Jing Mi and Zhi Gan Cao protect your stomach and help your body rebuild the hydration lost through heavy sweating.

3. Indications (When It Is Used)

Classic signs: This formula is a go-to when someone has a very high fever, a red face, extreme thirst, heavy sweating, a strong dislike of heat, and a forceful, surging pulse.
Modern applications: In clinical settings, Bai Hu Tang is often considered for severe heatstroke or certain infectious diseases. For conditions like the flu, pneumonia, or acute tonsillitis that present with these specific intense-heat symptoms, it can be a highly effective treatment approach.

Formula Analysis

The Mechanism in Classical Theory

1. The Power of Clearing Heat and Draining Fire

Shi Gao is intensely cold, making it the essential herb for clearing out excess heat in the Yang Ming stage. It is highly effective at rapidly bringing down a high fever.
Zhi Mu serves as the perfect partner. It is bitter, cold, and moistening. It not only assists in draining the fire but also nourishes the body's cooling fluids (Yin).
The synergy: By working together in mutual reinforcement, Shi Gao and Zhi Mu provide a much stronger cooling effect, directly dispersing the trapped internal heat and resolving the core illness.

2. The Ingenuity of Boosting Qi and Generating Fluids

Extreme internal heat acts like a fire, quickly evaporating the body's fluids and exhausting its vital energy (Qi).
Jing Mi and Zhi Gan Cao are cleverly included to protect the stomach, replenish lost fluids, and harmonize digestion.
The balance: They act as a safety buffer. They prevent the intense cold of the main herbs from damaging your digestive system, ensuring the formula can clear the heat while still supporting your body's natural strength and hydration.

3. Overall Synergistic Combination

The genius of Bai Hu Tang lies in the classic TCM principle of "combining cold and warm, tonifying and purging together."
The extreme cooling nature of Shi Gao and Zhi Mu is perfectly balanced by the gentle, sweet, and harmonizing nature of Jing Mi and Zhi Gan Cao.
This carefully designed teamwork ensures that the formula doesn't just attack the illness—it provides comprehensive care by clearing out the dangerous heat while actively restoring your energy and hydration.

How This Formula Compares

Clinical Comparison Table

Compare	Bai Hu Tang	Zhu Ye Shi Gao Tang	Huang Lian Jie Du Tang	Bai Du San
Primary Function	Clear Qi-aspect heat, generate fluids, stop thirst	Clear heat, generate fluids, benefit Qi, harmonise the Stomach	Clear heat, resolve toxin, drain fire	Release exterior, dispel wind-damp, benefit Qi
Formula Category	Heat-Clearing Formulas	Heat-Clearing Formulas	Heat-Clearing Formulas	Exterior-Releasing Formulas
Typical TCM Pattern	Stomach Heat	Yin Deficiency	Damp-Heat	Wind-Cold
Main Conditions	Fever, Dry Mouth & Throat, Spontaneous Sweating	Fever, Dry Mouth & Throat, Nausea, Fatigue & Low Energy	Fever, Anxiety Restlessness, Dry Mouth & Throat, Constipation, Sore Throat	Fever, Cold Limbs, Headache, Cough, Muscular Stiffness, Joint Discomfort
Main Herbs	Gypsum · Anemarrhena Rhizome · Licorice Root · Non-glutinous Rice	Lophatherum · Gypsum · Pinellia Rhizome · Ophiopogon Tuber · Ginseng Root · Licorice Root · Non-glutinous Rice	Coptis Rhizome · Scutellaria / Baikal Skullcap · Phellodendron Bark · Gardenia Fruit	Notopterygium Root · Pubescent Angelica Root · Chuanxiong Rhizome · Bupleurum Root · Platycodon Root · Peucedanum Root · Poria / Hoelen · Licorice Root · Ginseng Root · Fresh Ginger
Classical Source	Shang Han Lun (Zhang Zhongjing, Eastern Han)	Shang Han Lun (Zhang Zhongjing, Eastern Han)	Wai Tai Mi Yao (Wang Tao, Tang dynasty, citing earlier sources)	Tai Ping Hui Min He Ji Ju Fang / Xiao Er Yao Zheng Zhi Jue tradition

How to tell them apart

Bai Hu Tang, Zhu Ye Shi Gao Tang, Huang Lian Jie Du Tang and Bai Du San address heat patterns differently. Zhu Ye Shi Gao Tang clears residual heat with more fluid-generating force; Huang Lian Jie Du Tang clears fire toxin across the triple burner; Bai Du San releases exterior damp-cold. Bai Hu Tang is the foundational Yangming Qi-aspect heat formula for high fever, profuse sweating and intense thirst.

For educational reference only, based on traditional pattern differentiation — not a substitute for professional advice.

Clinical Modifications

Clinical Modifications for Bai Hu Tang

1. Qi-Aspect Heat with an Unresolved Exterior

When extreme internal heat is accompanied by lingering surface-level symptoms (like chills or a mild aversion to cold), practitioners often adapt the formula.

Modifications: Adding herbs like Bo He (Peppermint) and Jing Jie (Schizonepeta) helps release the exterior.
The Goal: This dual-action approach clears the internal heat while gently dispersing the pathogens on the surface, offering a comprehensive resolution.

2. Severe Fluid Depletion

If a high fever has severely damaged the body's hydration, the formula needs a stronger moisturizing effect.

Modifications: Herbs like Tian Hua Fen (Trichosanthes Root) and Mai Dong (Ophiopogon Root) are often added.
The Goal: These additions specifically focus on generating fluids, nourishing Yin, and effectively relieving intense thirst and dryness.

3. Concurrent Organ Excess (Digestive Blockage)

Sometimes, severe heat is paired with digestive blockages, leading to dry, hard stools and severe abdominal bloating.

Modifications: Purgative herbs like Da Huang (Rhubarb Root) and Mang Xiao (Mirabilite) are included.
The Goal: This strategy, often referred to in TCM as "drawing firewood from beneath the cauldron," unblocks the bowels to rapidly flush the intense heat out of the body from below.

4. Qi and Yin Deficiency

If a prolonged illness has exhausted both energy (Qi) and hydration (Yin), leading to fatigue, shortness of breath, and a dry mouth, the formula is modified into a famous variation called Bai Hu Jia Ren Shen Tang.

Modifications: Tonifying herbs like Ren Shen (Ginseng) and Huang Qi (Astragalus) are added.
The Goal: These herbs synergize with the original formula to strongly boost vitality while continuing to clear residual heat and restore fluids.

Modern Research

What the Science Suggests

1. Pharmacological Findings

Modern science has explored how the individual components of Bai Hu Tang work to manage severe heat patterns:

Shi Gao: Studies suggest it has strong antipyretic (fever-reducing) and anti-inflammatory properties.
Zhi Mu: Research indicates it may offer antibacterial effects, help lower fevers, and assist in regulating blood sugar.
Jing Mi and Zhi Gan Cao: These gentle ingredients are believed to support immune function and help protect the stomach lining from the harshness of the cold herbs.
Overall Effect: As a complete formula, it demonstrates notable anti-inflammatory and immune-regulating benefits, which aligns with its traditional use for intense fever patterns.

2. Clinical Studies

Extensive clinical observation has supported the traditional use of Bai Hu Tang in managing various infectious and febrile (fever-related) illnesses. These studies help provide a modern scientific framework for how the formula clears heat, drains fire, and protects the body's fluids during acute illnesses.

3. Dosage Form Innovations

To meet modern medical needs and improve safety, the delivery methods for Bai Hu Tang are continuously evolving. While traditional decoctions (teas) are still used, modern formats now include:

Concentrated herbal granules for easy mixing.
Ongoing research into advanced forms like specialized drip pills or injectables (in clinical hospital settings), ensuring the formula remains accessible and effective in contemporary practice.

Safety

Safety Considerations

1. Contraindications and Special Populations

Because Bai Hu Tang is intensely cold, it should generally be avoided by people with deficiency-cold or yang deficiency, especially those prone to cold limbs, abdominal pain, or diarrhea. Pregnant women should use it only under strict medical supervision.

2. Duration and Dietary Precautions

Stop taking Bai Hu Tang once the heat symptoms have resolved, and do not exceed the recommended dosage, as excessive use may damage vital qi. Avoid spicy, greasy, and irritating foods, and maintain a light diet with adequate fluids and nutritious foods to support recovery.

Available Products

Where to Get It

HJMEDICAL Hoi Tin Bai Hu Tang (White Tiger Decoction) 5:1 Concentrated Granules $24.93

HJMEDICAL Nong's Bai Hu Tang (Gypsum Combination) 5:1 Concentrated Granules $35.20

HJMEDICAL Hoi Tin Zhu Ye Shi Gao Tang (Bamboo Leaf & Gypsum) 5:1 Concentrated Granules $27.71

Nong's Zhu Ye Shi Gao Tang Extract Granules

HJMEDICAL Nong's Zhu Ye Shi Gao Tang (Bamboo Leaf & Gypsum) 5:1 Concentrated Granules $56.60

Hoi Tin Huang Lian Jie Du Tang Extract Granules

HJMEDICAL Hoi Tin Huang Lian Jie Du Tang (Coptis Decoction to Relieve Toxicity) 5:1 Concentrated Granules $51.36

Nong's Huang Lian Jie Du Tang Extract Granules

HJMEDICAL Nong's Huang Lian Jie Du Tang (Coptis Decoction to Relieve Toxicity) 5:1 Concentrated Granules $73.72

FAQ

Questions About Bai Hu Tang

Q1: What are the actions of Bai Hu Tang?

Bai Hu Tang has the actions of clearing Heat, draining Fire from the Qi level, and generating fluids. It is the representative formula for exuberant Yangming channel Heat, classically described as the “four greats.”

Q2: Which modern diseases is Bai Hu Tang suited to?

Modern TCM clinical practice commonly applies it to individuals whose pattern differentiation falls within Qi-level or Yangming channel Heat, including high fever of infectious or febrile illness with profuse sweating and intense thirst, certain cases of influenza or pneumonia of excess Heat type, heatstroke, and other presentations marked by high fever, great thirst, great sweating, and a flooding pulse.

Q3: Is Bai Hu Tang suitable for improving high fever, profuse sweating, and severe thirst?

For presentations of high fever, profuse sweating, intense thirst for cold drinks, a red face, irritability, a dry yellow tongue coating, and a flooding large (or slippery rapid) pulse — the classical “four greats” of Yangming Qi-level Heat — TCM commonly applies Bai Hu Tang as an adjunct. It cannot replace standard medical treatment of febrile illness, dehydration, or infection.

Q4: Who should not take Bai Hu Tang?

Those with an unresolved exterior pattern, Yang deficiency Cold, true Cold with false Heat, or fever without sweating and thirst of the Yangming type are generally not suitable. The formula is very cold; mistaken use in deficiency Cold can collapse Yang. Use should be assessed by a qualified TCM physician.

Q5: Why does this formula combine Shi Gao with Zhi Mu, rice, and licorice?

Shi Gao is intensely cold and acrid; it clears and vents Qi-level Heat. Zhi Mu clears Heat and nourishes already injured Yin fluids. Jing Mi (nonglutinous rice) and Zhi Gan Cao protect the Stomach and Middle Jiao so that the heavy cold of Shi Gao does not injure the digestive Yang. Together they clear blazing Heat while generating fluids and protecting the center.

Q6: How does Bai Hu Tang differ from Bai Hu Jia Ren Shen Tang or Da Cheng Qi Tang?

Bai Hu Jia Ren Shen Tang adds Ren Shen when Heat has already damaged Qi and fluids (great thirst that is not relieved, fatigue, or a more deficient pulse). Da Cheng Qi Tang is for Yangming fu-organ excess with constipation, abdominal hardness, and tidal fever — Heat that has bound with stool. Bai Hu Tang is for Yangming channel / Qi-level Heat without formed interior accumulation.

Q7: What are the main ingredients of Bai Hu Tang?

The classical formula consists of Shi Gao to clear and drain Qi-level Fire; Zhi Mu to clear Heat and nourish Yin fluids; Zhi Gan Cao to harmonize and protect the Middle; and Jing Mi (nonglutinous rice) to benefit the Stomach and prevent the cold herbs from injuring the center.

Q8: Is Bai Hu Tang suitable for long-term use?

No. It is an acute clearing formula for exuberant Qi-level Heat. Once fever, thirst, and sweating of the “four greats” subside, the formula should be stopped. Prolonged use of large doses of Shi Gao can injure Spleen and Stomach Yang and deplete Qi.

Q9: Can Bai Hu Tang be used if the patient is sweating heavily but still has high fever?

Yes — profuse sweating together with high fever and unquenchable thirst is a core indication, not a reason to avoid the formula. The sweating is Heat forcing fluids out; clearing the Qi-level Heat allows the sweating and fever to settle. If sweating has already led to collapse of Qi or fluids, Bai Hu Jia Ren Shen Tang may be more appropriate.

Q10: What lifestyle advice supports the use of Bai Hu Tang?

Cooling the environment, replacing fluids, avoiding heating and spicy foods, and resting help the formula clear Qi-level Heat and generate fluids. High fever, altered consciousness, inability to keep fluids down, or signs of severe infection require immediate medical care.

FAQ

General Questions

How do I choose the right formula?

TCM formulas are traditionally selected according to individual pattern differentiation rather than by symptom alone. If you're not sure which formula fits your presentation, take our AI Assessment below for a personalized starting point, then confirm with a qualified TCM practitioner.

What are concentrated herbal granules?

Concentrated herbal granules are made by decocting raw herbs, then extracting and concentrating the resulting liquid into a fine granule or powder form. This preserves the same active compounds as a traditional decoction while making the herbs far easier to store, measure, and prepare.

How should I take these products?

Dissolve the recommended amount of granules in hot water, stir until fully dissolved, and drink while warm — following the dosage and frequency advised by your TCM practitioner or as stated on the product packaging.

Are concentrated herbal granules equivalent to traditional decoctions?

Concentrated granules are produced from the same herbs and processed to retain their active compounds, so they are traditionally regarded as a convenient alternative to decoctions rather than a different remedy. Some practitioners note subtle differences in strength or absorption between the two forms, so your TCM practitioner may adjust dosage accordingly.

Are your products authentic?

Yes. HJMEDICAL sources its concentrated granules exclusively from established, reputable manufacturers such as Nong's and Hoi Tin, both long-standing names in the TCM granules industry, with GMP compliance stated directly on their packaging.

Are HJMEDICAL products manufactured under GMP standards?

HJMEDICAL sources its concentrated granules from established, reputable manufacturers such as Nong's and Hoi Tin, both long-standing names in the TCM granules industry. GMP compliance for these products is stated directly on their packaging.

Do you ship internationally?

Yes — we ship worldwide! Every order goes out via Hong Kong Post, and your exact shipping cost and estimated delivery time for your address are calculated and shown right at checkout, so there are never any surprises. We also offer free shipping once your order reaches our free-shipping threshold, so it's easy to stock up on your favorite formulas and save.

Can I take more than one formula at the same time?

Some formulas are traditionally combined, while others overlap or counteract each other. We recommend checking with a qualified TCM practitioner before combining formulas, especially if you are already taking other medication.

Are these products suitable during pregnancy or breastfeeding?

Some TCM formulas are not suitable during pregnancy or breastfeeding. Please consult a qualified TCM practitioner or your doctor before use if you are pregnant, trying to conceive, or nursing.

Do these products replace medical treatment?

No. These products are traditional herbal supplements intended to support wellbeing according to TCM principles — they are not a replacement for professional medical diagnosis or treatment. Please consult a qualified TCM practitioner or licensed healthcare provider before starting, stopping, or combining any treatment, especially if you have a chronic condition.

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.

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