Formula Pill (Wan)

Xi Huang Wan

Rhinoceros Bezoar Pill · 犀黄丸

Also known as: Xi Huang Wan (西黄丸)

A classical formula from Qing Dynasty surgical medicine, designed to clear toxic Heat, dissolve stubborn nodules, and improve Blood circulation. It is traditionally used for hard breast lumps, swollen lymph nodes, deep abscesses, and various types of masses. In modern practice, it is widely used as adjunctive support alongside conventional cancer treatment, particularly for breast, liver, and lung cancers, as well as for benign breast hyperplasia and lymphadenitis.

Origin Wai Ke Zheng Zhi Quan Sheng Ji (外科证治全生集) by Wang Weide (王维德) — Qing dynasty, 1740 CE
Composition 4 herbs
Niu Huang
King
Niu Huang
She Xiang
Deputy
She Xiang
Ru Xiang
Assistant
Ru Xiang
Mo Yao
Assistant
Mo Yao
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. Xi Huang Wan is designed to correct these specific patterns.

Why Xi Huang Wan addresses this pattern

This is the primary pattern Xi Huang Wan was designed to treat. When toxic Heat accumulates internally and combines with Phlegm and Blood stasis, hard nodules, abscesses, and deep swellings form in various body locations. Niu Huang directly clears the toxic Heat and dissolves Phlegm, She Xiang penetrates the channels to scatter stasis and break open accumulations, and Ru Xiang with Mo Yao invigorate Blood and stop the associated pain. The formula attacks all three components of this complex pattern simultaneously, making it especially suited for stubborn masses where Heat, Phlegm, and stasis are tightly intertwined.

A practitioner would look for one or more of these signs

Breast Lumps

Hard, fixed lumps in the breast (classical 'breast rock')

Swollen Lymph Nodes

Scrofula or cervical lymph node swellings

Subcutaneous Nodules

Phlegm nodules under the skin

Abscess

Deep abscesses (liu zhu) in muscles or joints

Red Tongue

Red tongue

Rapid Pulse

Slippery, rapid pulse

Commonly Prescribed For

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

Arises from: Toxic Heat with Phlegm and Blood Stasis

TCM Interpretation

In TCM, breast cancer (historically called 'breast rock,' 乳岩) is understood as the result of long-standing emotional constraint (particularly Liver Qi stagnation), which generates internal Heat over time. This Heat congeals body fluids into Phlegm, and the combined Qi stagnation and Heat cause Blood stasis. The three pathogenic factors of toxic Heat, Phlegm, and Blood stasis bind together in the breast tissue, forming a rock-hard, fixed mass. The Liver channel passes through the breast region, and emotional stress or unresolved anger is classically considered a key trigger. As the condition progresses, the toxic Heat intensifies and the mass may ulcerate or spread.

Why Xi Huang Wan Helps

Xi Huang Wan directly targets all three pathogenic factors involved in breast masses. Niu Huang clears the toxic Heat and dissolves the Phlegm that forms the substance of the mass. She Xiang penetrates deep into the channels to scatter the Blood stasis holding the mass in place. Ru Xiang and Mo Yao reinforce the Blood-moving action and help relieve pain. This formula has been the classical first-choice internal medicine for breast rock since its creation in 1740, and modern in-vitro studies have shown that Xi Huang Wan extracts can inhibit breast cancer cell proliferation in multiple cell lines. It is most commonly used today as an adjunct to conventional treatment rather than as a standalone therapy.

Also commonly used for

Abscess

Multiple abscesses, perianal abscess

Non-Hodgkin Lymphoma

Used as adjunctive therapy alongside conventional treatment

Liver Cancer

Adjunctive use in hepatocellular carcinoma

Lung Cancer

Adjunctive use in lung cancer

Gastric Cancer

Adjunctive use in gastric cancer

Colorectal Cancer

Adjunctive use in colorectal cancer

Osteomyelitis

Chronic osteomyelitis with Heat toxin signs

Appendicitis

Chronic appendicitis with inflammatory mass

Acne

Moderate to severe cystic or nodular acne

What This Formula Does

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

Therapeutic focus

In practical terms, Xi Huang Wan is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Xi Huang Wan 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 Xi Huang Wan works at the root level.

The conditions Xi Huang Wan treats arise from a convergence of three pathogenic factors: Fire toxin (火毒), Phlegm accumulation (痰凝), and Blood stasis (瘀血). When toxic Heat smoulders internally, it congeals body fluids into pathological Phlegm and obstructs Blood flow, causing stasis. These three factors bind together and lodge in the flesh, channels, or breast tissue, producing hard lumps, swollen nodules, abscesses, or deep-rooted sores.

In TCM surgical (external medicine) theory, this pattern of "Heat, Phlegm, and stasis intertwined" (热毒痰瘀互结) explains a wide range of masses and swellings. Breast lumps (known classically as "breast rock," 乳岩), scrofula (瘰疬, cervical lymph node swellings), deep abscesses (流注), and Phlegm nodules (痰核) all share this underlying mechanism. The toxic Heat fuels inflammation and tissue destruction, the Phlegm provides material substance for the mass, and the Blood stasis locks everything in place, making the lump firm and difficult to resolve.

Because all three factors reinforce each other, effective treatment must address all of them simultaneously. Clearing Heat alone does not break up the mass; moving Blood alone does not resolve the Phlegm. Xi Huang Wan is designed to attack this triad from every angle: resolving toxins, dissolving Phlegm, and dispersing stasis all at once.

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

Cool

Taste Profile

Predominantly bitter and pungent with aromatic qualities. Bitter to clear Heat and toxins, pungent to move Blood and disperse stagnation, aromatic to open channels and penetrate obstructions.

Ingredients

4 herbs

The herbs that make up Xi Huang Wan, 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
King — Main ingredient driving the formula
Niu Huang

Niu Huang

Cattle gallstone

Dosage 0.9g
Temperature Cool
Taste Bitter (苦 kǔ), Sweet (甘 gān)
Organ Affinity Heart, Liver

Role in Xi Huang Wan

Clears Heat and resolves toxins, dissolves Phlegm and dissipates nodules. As the principal medicinal, it directly targets the toxic Heat and Phlegm congestion that form the root of abscesses, breast lumps, and scrofula.
Deputy — Assists and enhances the King
She Xiang

She Xiang

Musk

Dosage 4.5g
Temperature Warm
Taste Acrid / Pungent (辛 xīn), Aromatic (芳香 fāng xiāng)
Organ Affinity Heart, Liver, Spleen

Role in Xi Huang Wan

Opens the channels, moves Qi stagnation, disperses Blood stasis, and resolves swelling of abscesses and toxic sores. Its powerfully aromatic and penetrating nature drives the formula's actions deep into the channels and collaterals.
Assistants — Supports or moderates other herbs
Ru Xiang

Ru Xiang

Frankincense resin

Dosage 30g
Temperature Warm
Taste Acrid / Pungent (辛 xīn), Bitter (苦 kǔ)
Organ Affinity Heart, Liver, Spleen
Preparation De-oiled (去油), ground to a very fine powder

Role in Xi Huang Wan

Invigorates Blood, moves Qi, reduces swelling, and alleviates pain. Works in concert with Mo Yao to break up Blood stasis in the channels and relieve the pain caused by toxic sores and nodules. Must be processed to remove oil (去油) to reduce gastric irritation.
Mo Yao

Mo Yao

Myrrh resin

Dosage 30g
Temperature Neutral
Taste Bitter (苦 kǔ), Acrid / Pungent (辛 xīn)
Organ Affinity Heart, Liver, Spleen
Preparation De-oiled (去油), ground to a very fine powder

Role in Xi Huang Wan

Invigorates Blood, dispels stasis, reduces swelling, and stops pain. Pairs with Ru Xiang to enhance the Blood-moving and pain-relieving effects. Must be processed to remove oil (去油) to reduce gastric irritation.

Why This Combination Works

How the herbs in Xi Huang Wan complement each other

Overall strategy

Xi Huang Wan addresses the intertwined pathomechanism of toxic Heat, Phlegm stagnation, and Blood stasis by combining a powerful Heat-clearing toxin-resolving King herb with aromatic channel-penetrating and Blood-moving agents. The formula is compact (only four medicinals plus an excipient) but potent, targeting all three pathogenic factors simultaneously.

King herb

Niu Huang (Cattle Gallstone) is the King. It is sweet and cool, entering the Heart and Liver channels, where it clears Heat, resolves toxins, and dissolves Phlegm nodules. By directly cooling the toxic Heat that drives mass formation and by transforming the Phlegm that constitutes the substance of the nodule, it tackles two of the three pathogenic factors at once.

Deputy herb

She Xiang (Musk) serves as Deputy. It is acrid, warm, and intensely aromatic, with the ability to penetrate the channels and collaterals. It opens Qi blockages, disperses Blood stasis, and breaks down abscesses and toxic swellings. Its warm, penetrating nature complements Niu Huang's cooling action: Niu Huang gains She Xiang's ability to drive the formula deep into the channels, while She Xiang's warmth is tempered by Niu Huang's coolness so it does not aggravate the Heat.

Assistant herbs

Ru Xiang (Frankincense) and Mo Yao (Myrrh) form a classic medicinal pair. Together they invigorate Blood, dispel stasis, reduce swelling, and stop pain. They reinforce the formula's Blood-moving strategy and directly address the pain that accompanies toxic sores and hard masses. Both are processed with oil removal (去油) to reduce their harsh effect on the Stomach.

Notable synergies

The Niu Huang and She Xiang pairing is the formula's most important synergy. As classical commentary notes, "Niu Huang gains She Xiang's acrid penetration and its Phlegm-dissolving power is enhanced; She Xiang gains Niu Huang's coolness and its warming nature does not fan the flames of Heat." The Ru Xiang and Mo Yao pair is also a well-known synergy, each enhancing the other's Blood-moving and pain-stopping effects. The formula is formed into pills with millet rice (黄米饭), which serves as an excipient that protects the Stomach from the harsh properties of the other ingredients, and is traditionally taken with aged rice wine (陈酒) to further enhance Blood circulation and speed the delivery of the formula's actions.

How to Prepare

Traditional preparation instructions for Xi Huang Wan

Traditional pill preparation (糊丸 hú wán): The formula is traditionally made as paste pills. Ru Xiang (Olibanum) and Mo Yao (Myrrha) are first processed with vinegar (醋制) to reduce their harsh, stomach-irritating properties and enhance their Blood-moving action. Each is ground to a fine powder separately. Niu Huang (Bovis Calculus) and She Xiang (Moschus) are similarly ground to extremely fine powder. All four powders are then combined thoroughly and formed into small pills using a rice paste or flour paste as the binding agent, creating 糊丸 (paste pills).

Modern prepared form: Xi Huang Wan is widely available as a Chinese patent medicine (中成药). The standard dosage per the Chinese Pharmacopoeia is 3 grams taken orally, twice daily, typically with warm boiled water. The pills should be swallowed whole and not chewed. Store sealed in a dry place.

Common Modifications

How practitioners adapt Xi Huang Wan for specific situations

Added
Chai Hu

6 - 9g, soothes the Liver and moves Qi

Xiang Fu

9 - 12g, regulates Liver Qi and relieves distension

When Liver Qi stagnation is a prominent driving factor behind the mass formation, adding Qi-moving herbs helps address the root cause and improves the formula's ability to disperse lumps.

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

Contraindications

Situations where Xi Huang Wan should not be used or requires extra caution

Avoid

Pregnancy. Xi Huang Wan contains She Xiang (Moschus/Musk), which has strong Blood-activating and channel-opening properties that can stimulate uterine contractions. The formula is explicitly listed as prohibited during pregnancy in the Chinese Pharmacopoeia.

Caution

Spleen and Stomach deficiency with Cold. The formula's herbs (especially Niu Huang) are cold in nature and bitter in taste. Using it in people with a weak, cold digestive system may worsen symptoms like loose stools, poor appetite, or abdominal pain.

Avoid

Known allergy or hypersensitivity to any of the formula's components, particularly Niu Huang (Bovis Calculus), She Xiang (Moschus), Ru Xiang (Olibanum), or Mo Yao (Myrrha). Skin rashes and drug-induced dermatitis have been reported.

Caution

Patterns of Yin deficiency without toxic Heat. This formula is designed for conditions where toxic Heat and Blood stasis are predominant. Using it for pure Yin-deficient or Qi-deficient constitutions without Heat toxin is inappropriate and may deplete the body further.

Caution

Active bleeding disorders or patients on high-dose anticoagulant therapy. Ru Xiang and Mo Yao both invigorate Blood circulation, which could potentially exacerbate bleeding.

Caution

Competitive athletes should use with caution. The Chinese drug regulatory label notes that athletes should exercise care, as She Xiang (Musk) may trigger a positive result in certain doping tests.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated in pregnancy. Xi Huang Wan contains She Xiang (Moschus/Musk), a potent Blood-activating and channel-opening substance well known to stimulate uterine contractions and potentially cause miscarriage. The Chinese Pharmacopoeia and all manufacturer labels explicitly state "孕妇忌服" (pregnant women must not take this). Additionally, there are reports that the formula may have teratogenic potential. Women of childbearing age who are taking Xi Huang Wan should use effective contraception and avoid becoming pregnant during treatment.

Breastfeeding

Use with caution during breastfeeding. She Xiang (Moschus) is a highly aromatic, penetrating substance, and its active compounds may transfer into breast milk. While there is no definitive clinical data on breast milk transfer, the strong Blood-moving and channel-opening nature of the formula's ingredients warrants caution. Niu Huang (Bovis Calculus) is cold in nature and could potentially affect the nursing infant's digestion. Breastfeeding mothers should only use Xi Huang Wan under close practitioner supervision, and the infant should be monitored for any signs of digestive upset, restlessness, or changes in feeding behavior.

Children

Xi Huang Wan is generally not recommended for pediatric use without specific practitioner guidance. The formula contains She Xiang (Moschus) and Niu Huang (Bovis Calculus), both potent and precious substances whose effects on developing children have not been well studied. If a practitioner determines use is appropriate for an older child or adolescent, the dosage should be significantly reduced (typically one-third to one-half the adult dose depending on age and body weight). It should not be given to infants or very young children. The formula's cold, Blood-moving properties may be too harsh for a child's immature digestive system.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Xi Huang Wan

Anticoagulants and antiplatelet agents: Ru Xiang (Olibanum) and Mo Yao (Myrrha) both invigorate Blood circulation. When combined with drugs like warfarin, heparin, aspirin, or clopidogrel, there is a theoretical risk of enhanced anticoagulant effects and increased bleeding tendency. Coagulation parameters should be monitored if concurrent use is necessary.

Immunosuppressants: Xi Huang Wan has demonstrated immunomodulatory effects in research, including enhancement of T-cell activity and NK cell function. This could theoretically counteract immunosuppressive medications such as cyclosporine, tacrolimus, or corticosteroids. Patients on immunosuppressive therapy (e.g., post-transplant) should avoid concurrent use without medical supervision.

Chemotherapy drugs: While clinical studies suggest Xi Huang Wan may complement certain chemotherapy regimens by reducing side effects and potentially enhancing efficacy, this combination should only be undertaken under the guidance of both an oncologist and a qualified TCM practitioner, as interactions may vary by specific chemotherapy agent.

Usage Guidance

Practical advice for getting the most out of Xi Huang Wan

Best time to take

Twice daily, preferably 30 minutes to 1 hour after meals to reduce potential stomach irritation from Ru Xiang and Mo Yao.

Typical duration

Typically taken in courses of 1-3 months for tumor-related conditions, then reassessed by a practitioner. For acute inflammatory conditions (boils, abscesses), shorter courses of 2-4 weeks may suffice.

Dietary advice

While taking Xi Huang Wan, avoid cold and raw foods, greasy or deep-fried foods, and excessively spicy or irritating foods, as these can impair Spleen and Stomach function and hinder the formula's therapeutic action. Since the formula is cool in nature and targets Heat toxin, consuming additional cooling or Heat-clearing foods such as mung beans, winter melon, or pears in moderation is acceptable. Alcohol should be avoided, as it generates Damp-Heat and may interfere with the formula's detoxifying function. A light, easily digestible diet rich in fresh vegetables and adequate protein is recommended to support the body during treatment.

Xi Huang Wan originates from Wai Ke Zheng Zhi Quan Sheng Ji (外科证治全生集) by Wang Weide (王维德) Qing dynasty, 1740 CE

Classical Texts

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

From the Wai Ke Zheng Zhi Quan Sheng Ji (外科证治全生集):

The original text describes Xi Huang Wan (recorded there as 犀黄丸) as a formula for treating deep-rooted sores, nodular masses (瘰疬), migratory abscesses (流注), and other toxic swellings. Wang Weide emphasized the principle of clearing Heat toxin and dispersing Blood stasis to resolve stubborn masses that conventional external treatments could not reach.

Wang Weide's broader treatment philosophy, stated in the same work, was: "以消为贵,以托为畏" ("Dissolving [the lesion] is the most valued approach; pushing [pus] outward is to be feared"). This reflects his conservative, internal-medicine approach to surgical disease, and Xi Huang Wan exemplifies this principle by using internally taken herbs to resolve external masses from within.

Historical Context

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

Xi Huang Wan (originally written as 犀黄丸, with 犀 meaning "rhinoceros," likely referring to the precious and penetrating nature of the formula, not actual rhinoceros horn) was created by Wang Weide (王维德, 1669–1749), also known by his courtesy name Wang Hongxu (王洪绪). Wang came from a distinguished medical family in Wuxian (modern-day Suzhou, Jiangsu Province) whose expertise in surgical medicine (疡科) spanned several generations, beginning with his great-grandfather Wang Ruogu.

Wang compiled the Wai Ke Zheng Zhi Quan Sheng Ji (外科证治全生集, also known as Wai Ke Quan Sheng Ji), first published in 1740 during the reign of Emperor Qianlong. This work, based on over 40 years of clinical experience combined with family-transmitted secret formulas, became the foundational text of the "Quan Sheng" (全生) school of surgical medicine in the Suzhou region. Wang's approach was distinctive for its emphasis on Yin-Yang differentiation in surgical disease. He classified red, hot swellings as Yang (实证) conditions and white, painless masses as Yin (阴寒) conditions, creating specific warming strategies for the latter. Xi Huang Wan, along with Yang He Tang and Xiao Jin Dan, are among his most celebrated and enduring contributions. In the late Qing dynasty, the renowned physician Ma Peizhi annotated and expanded the text, helping it reach even wider circulation.

Modern Research

3 published studies investigating the pharmacological effects or clinical outcomes of Xi Huang Wan

1

Preclinical study: XHW inhibited Lewis lung carcinoma equivalent to cisplatin in a syngeneic mouse model (2021)

Zhang Z, Wang J, Duan H, Liu D, Zhou X, Lin X, Pang H, Sun M, Zhou T, Hoffman RM, Hu K. Anticancer Research, 2021, 41(7): 3269-3281.

This animal study tested Xi Huang Wan at three dose levels against Lewis lung carcinoma in mice with intact immune systems, compared to cisplatin chemotherapy. The high-dose XHW group showed tumor inhibition equivalent to cisplatin but without the toxicity (no significant weight loss or organ damage). RNA sequencing revealed that XHW worked through multiple signaling pathways including TNF, estrogen, and PPAR pathways, suggesting a broad anti-tumor mechanism different from conventional chemotherapy.

PubMed
2

Meta-analysis: Xihuang Pill combined with chemotherapy for breast cancer treatment (2019)

Mao D, Feng L, Huang S, Zhang S, Peng W, Zhang S. Evidence-Based Complementary and Alternative Medicine, 2019, Article ID 3502460.

This meta-analysis pooled data from randomized controlled trials examining Xi Huang Wan combined with standard chemotherapy for breast cancer compared to chemotherapy alone. Results suggested that adding Xi Huang Wan may enhance the overall response rate, improve quality of life, and reduce some chemotherapy-related side effects. However, the authors noted that the methodological quality of the included trials was variable, and larger, more rigorous studies are needed.

3

Meta-analysis: Xihuang Pill/Capsule as adjuvant treatment for breast cancer (26 RCTs, 2,272 patients)

Referenced in: Molecular Cancer, 2025 (review article on TCM in breast cancer treatment).

A large meta-analysis included 26 randomized controlled trials with over 2,200 breast cancer patients. It found that Xi Huang Wan combined with chemotherapy or endocrine therapy could inhibit tumor progression and that the formula may offer benefits in enhancing cellular immune function during cancer treatment. The analysis supported its role as an adjunctive therapy but highlighted the need for higher-quality evidence.

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.