Formula Powder (San)

Zhu Huang San

Pearl and Bezoar Powder · 珠黄散

A simple two-ingredient topical powder made from Pearl and Cattle Gallstone (Bezoar), traditionally blown onto the throat or applied to mouth sores. It clears Heat-toxin and promotes tissue healing, making it useful for sore throats, tonsillitis, oral ulcers that won't heal, and gum inflammation.

Origin Yi Ji (《医级》), Volume 8 — Qing dynasty (清代)
Category Heat-clearing formulas Topical formulas for sores and wounds
Therapeutic focus Throat health Oral health Mouth sore relief
Composition 2 herbs
Zhen Zhu
King
Zhen Zhu
Niu Huang
Deputy
Niu Huang
Explore composition

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. Zhu Huang San is designed to correct these specific patterns.

Why Zhu Huang San addresses this pattern

Zhu Huang San directly targets Toxic Heat (热毒) lodged in the throat and oral cavity. When Toxic Heat accumulates in the Lung and Stomach channels, it rises to the throat, causing acute inflammation, redness, swelling, and tissue damage. Niu Huang is one of the most potent substances for clearing Toxic Heat, while Zhen Zhu resolves residual toxins and promotes healing of the damaged tissue. The formula is applied topically, delivering its Heat-clearing and tissue-regenerating actions directly to the site of disease.

A practitioner would look for one or more of these signs

Sore Throat

Severe throat pain worsened by swallowing

Oral Ulcers

Mouth sores that are red, painful, and slow to heal

Swollen Tonsils

Red, swollen tonsils with possible pus or exudate

Gingivitis

Red, swollen, ulcerated gums

Commonly Prescribed For

These conditions can arise from the patterns above. A practitioner would consider Zhu Huang San when these conditions are specifically caused by those patterns — not for all cases of these conditions.

Arises from: Toxic-Heat Stomach Fire

TCM Interpretation

In TCM, recurrent oral ulcers (口疮) are most commonly understood as a local manifestation of Heat, whether from external Heat-toxin or internally generated Fire (particularly Stomach Fire or Heart Fire). The Heat damages the delicate oral mucosa, creating painful, inflamed craters. When the Heat is persistent or the body's repair capacity is overwhelmed, these ulcers become chronic and refuse to close. The Lung and Stomach channels both traverse the oral cavity, so Heat in either organ system can produce mouth sores.

Why Zhu Huang San Helps

Zhu Huang San is applied directly to oral ulcers as a topical powder. Niu Huang clears the local Heat-toxin that is perpetuating the ulceration, while Zhen Zhu promotes tissue regeneration and helps close the sore. This dual action of "clearing the rot and generating new tissue" (祛腐生肌) makes the formula well-suited for ulcers that have lingered because the underlying Heat-toxin has not been adequately resolved. The fine powder form allows it to coat and adhere to the ulcer surface for sustained local action.

Also commonly used for

Tonsillitis

Acute tonsillitis with red, swollen tonsils

Gingivitis

Gum inflammation with swelling, erosion, or ulceration

Stomatitis

Oral mucosal inflammation and erosion

What This Formula Does

Every TCM formula has a specific set of actions — here's what Zhu Huang San does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Zhu Huang San is primarily used to support these areas of health:

Throat health Oral health Mouth sore relief

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Zhu Huang San performs to restore balance in the body:

Clears Heat and resolves toxins Promotes tissue regeneration and heals sores Reduces swelling and alleviates pain Cools the Blood

How It Addresses the Root Cause

TCM doesn't just suppress symptoms — it aims to resolve the underlying imbalance. Here's how Zhu Huang San works at the root level.

This formula addresses conditions where Heat-toxin (热毒) accumulates in the upper body, particularly in the throat and mouth. In TCM understanding, the throat is a gateway where multiple channels converge, especially the Lung and Stomach channels. When Heat-toxin builds up in these channels, it rises upward and lodges in the throat and oral cavity, causing redness, swelling, pain, and tissue breakdown.

As the Heat-toxin intensifies, it "burns" the local flesh, leading to ulceration and erosion of the mucosal lining. The tissue becomes inflamed and begins to decay (a process called "rot" or 腐 in TCM). In milder cases this produces sore throat and swollen tonsils. In more severe or prolonged cases, it causes persistent oral ulcers that refuse to heal, or gum erosion (牙疳). The failure of these lesions to close reflects ongoing toxic Heat damaging local tissue faster than the body can repair it.

The formula works by directly clearing the Heat-toxin at the site of disease while simultaneously promoting the body's natural tissue repair process, addressing both the cause (toxic Heat) and the consequence (tissue breakdown and non-healing sores).

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 salty and bitter with a slightly fishy quality: salty to soften hardness and enter the Blood level, bitter to clear Heat and dry Dampness.

Target Organs

Heart Lungs Stomach

Channels Entered

Heart Liver Lung

Ingredients

2 herbs

The herbs that make up Zhu Huang San, organized by their role in the prescription

King — Main ingredient driving the formula
Deputy — Assists and enhances the King
King — Main ingredient driving the formula
Zhen Zhu

Zhen Zhu

Pearl

Dosage 0.9g (classical); 500g per 1000g batch (modern)
Temperature Cold
Taste Sweet (甘 gān), Salty (咸 xián)
Organ Affinity Heart, Liver
Preparation Ground to extremely fine powder using water-flying method (水飞法)

Role in Zhu Huang San

Clears Heat, resolves toxins, promotes tissue regeneration, and heals sores. As the primary ingredient, Pearl directly addresses the ulcerated and eroded mucosal tissue by encouraging new tissue growth and closing non-healing wounds.
View herb details
Deputy — Assists and enhances the King
Niu Huang

Niu Huang

Cattle gallstone

Dosage 0.3g (classical); 500g per 1000g batch (modern)
Temperature Cool
Taste Bitter (苦 kǔ), Sweet (甘 gān)
Organ Affinity Heart, Liver

Role in Zhu Huang San

Clears Heat, resolves toxins, cools the Blood, and reduces swelling. Niu Huang powerfully clears the Heat-toxin that causes the throat and oral inflammation, while its cooling nature reduces the redness, swelling, and pain.
View herb details

Why This Combination Works

How the herbs in Zhu Huang San complement each other

Overall strategy

Zhu Huang San takes a direct, topical approach to Heat-toxin in the throat and mouth. By combining a substance that powerfully clears Heat-toxin with one that promotes tissue healing, the formula simultaneously removes the pathogenic cause and repairs the resulting damage.

King herbs

Zhen Zhu (Pearl) serves as the King herb. It clears Heat, resolves toxins, and most importantly promotes tissue regeneration and closes non-healing sores (生肌敛疮). In this formula, Pearl addresses the primary clinical problem: ulcerated, eroded tissue in the throat or mouth that will not heal on its own. Its cool nature also helps soothe the inflamed tissue.

Deputy herbs

Niu Huang (Cattle Gallstone) acts as the Deputy. It is a premier substance for clearing Heat-toxin, cooling the Blood, and reducing swelling. While Pearl focuses on healing the damaged tissue, Niu Huang targets the root cause by powerfully clearing the accumulated Heat-toxin driving the inflammation and tissue destruction. Together they form a complementary pair: one clears the toxin, the other repairs the damage.

Notable synergies

The Pearl and Niu Huang pairing is a classic combination in throat and mouth formulas. Pearl's tissue-regenerating action would be undermined if the Heat-toxin continued to attack the tissue, while Niu Huang's toxin-clearing action alone would not heal existing sores. Together they create a complete therapeutic cycle: clearing the cause and repairing the result. This is reflected in the formula's classical description as "clearing Heat-toxin while promoting tissue regeneration" (清热解毒，祛腐生肌).

How to Prepare

Traditional preparation instructions for Zhu Huang San

Grind Zhen Zhu (Pearl) and Niu Huang (Calculus Bovis) separately to an extremely fine powder. Then combine and mix thoroughly until the powder is uniform in color (a pale yellowish hue) and texture. Store in an airtight porcelain or glass container to prevent moisture absorption and loss of potency.

For topical use (most common): Take a small amount of the powder and blow it directly onto the affected area of the throat, gums, or oral mucosa using a thin tube or insufflator, 2 to 3 times daily. Alternatively, the powder can be sprinkled directly onto oral ulcers or sores.

For internal use (pediatric convulsions, per classical text): Mix 0.6 to 0.9 grams of the powder with a decoction of Deng Xin Cao (Medulla Junci, rush pith) and administer orally. Internal dosing is 0.6 grams per dose, twice daily for adults.

Common Modifications

How practitioners adapt Zhu Huang San for specific situations

Added
Bing Pian

0.3-0.5g, to enhance clearing of Heat and open the throat

Peng Sha

1-3g (calcined), to clear Heat-toxin and reduce swelling

Bing Pian (Borneol) strongly penetrates obstructed tissue to open the throat and relieve pain, while calcined Peng Sha (Borax) adds antiseptic and Heat-clearing action for severe swelling.

Related Formulas

Formulas often compared to or combined with Zhu Huang San, with a side-by-side look at how their compositions differ

Zhu Huang Chui Hou San
Derivative

What changed

Zhu Huang Chui Hou San (珠黄吹喉散) is an expanded version that adds Borax, Watermelon Frost, Realgar, Catechu, Coptis, Phellodendron, and Borneol to the Pearl and Bezoar base. The much larger ingredient list makes it more broadly effective for severe throat and mouth ulceration with pus, while the simpler two-ingredient Zhu Huang San is a gentler, more focused option for milder cases or situations where a minimal formula is preferred.

Similar indication
Cold 4 herbs Powder (San)

A classical topical powder applied directly to the mouth and throat to relieve pain and promote healing of mouth ulcers, sore throats, swollen gums, and other oral inflammations caused by accumulated Heat and toxins. It works by clearing Heat, reducing swelling, and encouraging damaged tissue to heal.

Therapeutic focus
Oral and Dental Health Throat Health Mouth Ulcer Relief

How it compares

Bing Peng San (Borneol and Borax Powder) also treats oral ulcers, throat pain, and gum sores. It emphasizes Borneol and Borax as its primary ingredients for penetrating and clearing Heat-toxin, with a stronger focus on opening obstructions and relieving acute pain. Zhu Huang San focuses more on tissue regeneration for non-healing ulcers, while Bing Peng San is often preferred for acute swelling and pain.

Composition comparison

Shared (0)
—
Only in Zhu Huang San (2)
Zhen Zhu Niu Huang
Only in Bing Peng San (4)
Bing Pian Zhu Sha Peng Sha Xuan Ming Fen (玄明粉, Refined Mirabilite)
Similar indication
Cold 7 herbs Powder (San)

A classical topical powder used to clear Heat-Toxin from the throat and mouth, promote healing of ulcerated tissue, and relieve swelling and pain. It is applied directly to sore, ulcerated areas of the throat, mouth, or gums, and is also used as a retention enema for intestinal ulcers.

Therapeutic focus
Oral health Throat health Digestive health Wound healing

How it compares

Xi Lei San (Tin-Like Powder) is another topical powder for mouth and throat ulceration. It contains a larger array of ingredients including Watermelon Frost, Borneol, and Calcined Borax, giving it a broader spectrum. Xi Lei San is often chosen for more stubborn or extensive ulceration, while Zhu Huang San's simpler composition makes it suitable as a first-line topical for straightforward oral ulcers.

Composition comparison

Shared (2)
Zhen Zhu Niu Huang
Only in Zhu Huang San (0)
—
Only in Xi Lei San (5)
Qing Dai Bing Pian Xiang Ya Xie (象牙屑) Bi Qian Tan (壁钱炭) Ren Zhi Jia (人指甲)
Similar indication
Cold 6 herbs Water Pill (Shui Wan)

A famous classical pill used to clear Heat-toxin, reduce swelling, and relieve pain. It is best known as a throat remedy for acute sore throat, tonsillitis, and mouth sores, and can also be applied externally for boils, abscesses, and skin infections. Contains potent but potentially toxic ingredients, so it must be used under professional guidance and only for short periods.

Therapeutic focus
Throat health Skin health Oral health Infection support

How it compares

Liu Shen Wan (Six Spirits Pill) also uses Niu Huang and Zhen Zhu but adds Musk, Realgar, Toad Venom, and Borneol, making it a much more powerful formula for severe throat infections and toxic swellings. It can be taken internally or applied externally. Zhu Huang San is milder and purely topical, better suited for less severe cases or when the potent ingredients in Liu Shen Wan are not warranted.

Composition comparison

Shared (2)
Zhen Zhu Niu Huang
Only in Zhu Huang San (0)
—
Only in Liu Shen Wan (4)
Chan Su Xiong Huang She Xiang Bing Pian

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

Contraindications

Situations where Zhu Huang San should not be used or requires extra caution

Caution

Yin deficiency patterns of the throat or mouth (without true Heat-Toxin). This formula is strongly cold and Heat-clearing; using it on sores caused by deficiency cold or Yin deficiency with empty Fire may worsen the condition or delay healing.

Avoid

Known allergy or hypersensitivity to any animal-derived ingredient, particularly bovine gallstone (Niu Huang) or Pearl (Zhen Zhu). Discontinue use immediately if allergic reaction occurs.

Caution

Open, deeply penetrating wounds or heavily bleeding lesions. This powder is designed for superficial mucosal ulcers and sores, not deep traumatic wounds.

Caution

Patients with known jaundice or severe liver disease should exercise caution due to bilirubin content in Niu Huang, which could theoretically exacerbate bilirubin overload.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Use with caution during pregnancy. Niu Huang (Calculus Bovis) is classified as cold in nature and enters the Heart and Liver channels. While primarily used topically (which limits systemic absorption), internal use of this formula during pregnancy is generally not recommended without professional guidance. No specific teratogenic effects have been reported for topical application at standard doses, but pregnant women should consult a qualified practitioner before use.

Breastfeeding

When used topically as directed (blown onto throat or oral lesions), systemic absorption is minimal and the formula is generally considered compatible with breastfeeding. If taken internally, the very small doses involved (0.6 grams) also pose low risk, but caution is still warranted. There is no documented evidence of adverse effects on breast milk or nursing infants. Nonetheless, breastfeeding mothers should consult a practitioner before internal use, and topical application should be preferred.

Children

Zhu Huang San has a long history of pediatric use. The classical text (Yi Ji) specifically describes its application for childhood phlegm-convulsions (xiao er tan chi): mix 0.6 to 0.9 grams with a rush pith (Deng Xin Cao) decoction and administer orally. For topical use in children with oral ulcers or throat sores, use a smaller amount of powder than for adults and reduce application frequency to 1 to 2 times daily. The formula's composition is relatively gentle for topical application, but internal dosing in young children (under 3 years) should only be done under professional supervision due to the potent nature of Niu Huang.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Zhu Huang San

No well-documented pharmaceutical drug interactions have been established specifically for Zhu Huang San as a topical formula, since systemic absorption from mucosal application is limited.

However, if taken internally, the Niu Huang (Calculus Bovis) component contains bile acids (cholic acid, deoxycholic acid) and bilirubin, which could theoretically interact with medications metabolized via hepatic bile acid pathways. Patients taking anticoagulants or antiplatelet medications should use caution, as Pearl (Zhen Zhu) has mild hemostatic properties and Niu Huang has complex effects on the cardiovascular system. Patients with liver disease taking hepatically metabolized drugs should consult their physician before internal use.

Usage Guidance

Practical advice for getting the most out of Zhu Huang San

Best time to take

Apply topically 2 to 3 times daily, ideally after meals and after rinsing the mouth, so the powder can adhere to clean mucosal surfaces.

Typical duration

Acute use: 3 to 7 days for throat pain and oral ulcers, reassessed if symptoms persist beyond one week.

Dietary advice

While using this formula, avoid spicy, hot, and irritating foods (chili, pepper, deep-fried foods, strong alcohol) as these generate Heat and worsen throat and oral inflammation. Avoid excessively sour or salty foods that may sting open sores. Favor bland, cooling, and soft foods such as congee, mung bean soup, pear, and watermelon. Smoking should also be avoided as it directly irritates the throat and oral mucosa.

Zhu Huang San originates from Yi Ji (《医级》), Volume 8 — Qing dynasty (清代)

Classical Texts

Key passages from the classical Chinese medical texts that first described Zhu Huang San and its clinical use

《医级》卷八 (Yi Ji, Volume 8):

珍珠三分，牛黄一分。上研极细，或吹或掺。小儿痰痓，以灯心煎汤调服二、三分。

Pearl three fen, Niu Huang one fen. Grind the above to an extremely fine powder; either blow onto the affected area or sprinkle it on. For pediatric phlegm-induced convulsions, take 0.6 to 0.9 grams mixed with a decoction of Deng Xin Cao (rush pith).

This passage captures the formula's essential simplicity: just two ingredients ground to a very fine powder, applied topically for throat conditions or taken internally (in very small doses) for childhood convulsions caused by wind, phlegm, and fire toxin attacking the throat.

Historical Context

How Zhu Huang San evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

Zhu Huang San has appeared in several classical texts under the same name but with varying compositions. The best-known version, containing only Zhen Zhu (Pearl) and Niu Huang (Calculus Bovis), comes from the Yi Ji (《医级》), Volume 8, a Qing dynasty medical compendium. This version is the basis of the modern Chinese patent medicine (zhong cheng yao) still manufactured today by companies such as Tong Ren Tang.

An earlier version recorded in the Jiang Nang Cuo Yao (《绛囊撮要》), also from the Qing dynasty, is a more elaborate formula containing Xi Niu Huang (rhinoceros-grade Calculus Bovis), Bing Pian (Borneol), Zhen Zhu (Pearl), and Wei Shi Gao (calcined Gypsum). Another variant in the Zhong Yi Yan Ke Xue (《中医眼科学》) is an ophthalmic formula containing Zhen Zhu, Xi Huang (Calculus Bovis), Zhu Sha (Cinnabar), and She Xiang (Moschus), used for eye conditions such as fire-type pterygium and corneal opacity.

The streamlined two-ingredient version from the Yi Ji became the standard because of its elegant simplicity: Niu Huang clears Heat-Toxin and cools Blood, while Zhen Zhu promotes tissue regeneration and closes sores. Together they address both the root cause (toxic Heat) and the local tissue damage. This formula reflects a broader tradition in Chinese throat medicine (hou ke, 喉科), which flourished during the Qing dynasty alongside the development of warm-disease (wen bing) theory.