Niu Huang Jie Du Pian

Cattle Gallstone Detoxification Tablets · 牛黄解毒片

Also known as: Niu Huang Jie Du Wan (牛黄解毒丸, original pill form), Cattle Gallstone Poison-Resolving Tablets

A widely used traditional formula for clearing excess Heat and toxins from the body. It is commonly taken for sore throats, swollen gums, mouth ulcers, red and painful eyes, and constipation caused by internal Heat buildup. This is a short-term remedy and should not be used for prolonged periods.

Origin Zhèng Zhì Zhǔn Shéng (《证治准绳》, Standards of Patterns and Treatments) by Wáng Kěn Táng — Míng dynasty, 1602 CE
Composition 8 herbs
Niu Huang
King
Niu Huang
Shi Gao
Deputy
Shi Gao
Da Huang
Deputy
Da Huang
Huang Qin
Deputy
Huang Qin
Xiong Huang
Assistant
Xiong Huang
Bing Pian
Assistant
Bing Pian
Jie Geng
Assistant
Jie Geng
Gan Cao
Envoy
Gan Cao
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. Niu Huang Jie Du Pian is designed to correct these specific patterns.

Why Niu Huang Jie Du Pian addresses this pattern

This is the primary pattern addressed by Niu Huang Jie Du Pian. When Fire-toxin blazes internally, it flares upward to attack the head and face, causing painful red swelling in the throat, gums, eyes, and mouth. The formula uses Niu Huang to clear Heat-toxin from the Heart and Liver, Shi Gao and Huang Qin to drain blazing Stomach and Lung Fire, Xiong Huang and Bing Pian to resolve toxin and reduce painful swelling locally, and Da Huang to purge accumulated Heat downward through the bowels. The overall effect is to extinguish Fire-toxin from multiple directions simultaneously.

A practitioner would look for one or more of these signs

Sore Throat

Severe sore throat with redness and swelling

Swollen Gums

Swollen, painful, possibly bleeding gums

Mouth Ulcers

Mouth and tongue sores that are painful and inflamed

Red Eyes

Red, swollen, painful eyes

Constipation

Constipation with dry stools due to Heat

Fever

Fever or feeling of internal heat

Commonly Prescribed For

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

Arises from: Stomach Fire (Stomach Heat) Fire Toxin

TCM Interpretation

TCM understands most acute oral ulcers as a manifestation of Heat accumulating in the Stomach and Spleen channels, which then flares upward to the mouth (the opening of the Spleen and Stomach system). When a person eats too many rich, spicy, or greasy foods, stays up late, or experiences emotional stress, Heat can build up in the Stomach. Because the Stomach channel runs through the gums and mouth, this accumulated Heat "steams" upward and scorches the oral mucosa, creating painful sores. The tongue and oral tissues become red and inflamed, and the sores are typically surrounded by a red halo. Accompanying signs often include thirst, bad breath, preference for cold drinks, yellow tongue coating, and constipation.

Why Niu Huang Jie Du Pian Helps

Niu Huang Jie Du Pian addresses oral ulcers by attacking the root cause: excess Heat in the Stomach. Shi Gao (Gypsum), the heaviest ingredient in the formula, is one of TCM's most powerful Stomach Heat-clearing substances. Da Huang (Rhubarb) purges accumulated Heat downward through the bowels, removing the Heat that would otherwise continue rising to the mouth. Niu Huang clears Heart Heat and resolves toxins. Bing Pian (Borneol) has a direct pain-relieving and anti-inflammatory effect on oral tissues. This formula is appropriate only for ulcers caused by excess Heat ("real Fire"), characterized by red, painful sores with a yellow tongue coating. It should not be used for chronic, pale ulcers that worsen with fatigue, which indicate deficiency.

Also commonly used for

Swollen Gums

Acute gingivitis with painful, swollen gums

Tonsillitis

Acute tonsillitis with throat swelling and pain

Viral Conjunctivitis

Acute conjunctivitis with red, painful eyes

Constipation

Constipation from excess internal Heat

Dental Problems

Acute toothache and dental abscess from Stomach Fire

Pharyngitis

Acute pharyngitis

Stomatitis

Oral stomatitis and glossitis

Lumps

Mumps with jaw swelling and pain

Boils

Boils, furuncles, and skin abscesses from Heat-toxin

What This Formula Does

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

Therapeutic focus

In practical terms, Niu Huang Jie Du Pian is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Niu Huang Jie Du Pian 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 Niu Huang Jie Du Pian works at the root level.

This formula addresses a pattern of excess Fire-Heat and toxic Heat blazing internally (火热内盛, huǒ rè nèi shèng). In TCM theory, when Fire-toxin accumulates in the Stomach and Lung organ systems, it tends to flare upward because Heat naturally rises. The head and face are particularly vulnerable because they sit at the top of the body where rising Heat concentrates.

When Stomach Fire blazes upward, it scorches the gums and mouth, producing swollen, painful gums and mouth ulcers. When Lung Heat accumulates, it affects the throat (the gateway of the Lung), causing sore, swollen throat. Fire-toxin can also rush into the eyes along the channels, producing redness, swelling, and pain. At the same time, the Heat dries out the intestinal fluids, which may lead to constipation. The tongue in this pattern is typically red with a yellow coating, and the pulse is rapid and forceful, all signs of genuine excess Heat rather than deficiency-type warmth.

The key clinical distinction is that this is excess Fire (实火, shí huǒ), not deficiency Heat. Excess Fire features intense, acute inflammation with visible redness, swelling, and strong pain, a preference for cold drinks, dark yellow urine, and constipation. Deficiency Heat, by contrast, produces milder, chronic, smoldering warmth with night sweats and soft stools. Using this cold, purgative formula for deficiency Heat would further weaken the body's resources without addressing the root cause.

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 acrid (pungent) with a cold quality. Bitter to drain Fire and dry Dampness, acrid to disperse and open (especially in the throat), with a slightly sweet undertone from Gan Cao (licorice) to harmonize.

Ingredients

8 herbs

The herbs that make up Niu Huang Jie Du Pian, 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
King — Main ingredient driving the formula
Niu Huang

Niu Huang

Ox gallstones

Dosage 5g (in full batch of ~780g total)
Temperature Cold
Taste Bitter, Sweet
Organ Affinity Heart, Liver

Role in Niu Huang Jie Du Pian

The chief herb of the formula. Bitter in flavor and cool in nature, it enters the Heart and Liver channels. It powerfully clears Heat from the Heart, resolves toxins, and calms the spirit. As the King herb, it directly targets the core pathomechanism of Heat-toxin accumulating internally and flaring upward.
Deputies — Assists and enhances the King
Shi Gao

Shi Gao

Gypsum

Dosage 200g (in full batch)
Temperature Cold
Taste Pungent, Sweet
Organ Affinity Lungs, Stomach

Role in Niu Huang Jie Du Pian

Acrid and very cold, it enters the Lung and Stomach channels. It powerfully clears Stomach and Lung Heat, drains Fire, and relieves thirst and irritability. As the largest ingredient by weight, it provides the main cooling force against blazing Stomach Fire that causes gum swelling and mouth sores.
Da Huang

Da Huang

Rhubarb

Dosage 200g (in full batch)
Temperature Cold
Taste Bitter
Organ Affinity Spleen, Stomach, Large Intestine, Liver, Pericardium

Role in Niu Huang Jie Du Pian

Bitter and cold, it clears Heat, drains Fire downward, and purges the bowels. By promoting bowel movement, it provides an exit route for Heat-toxin to leave the body through the stool, preventing Heat from continuing to steam upward to the head and face.
Huang Qin

Huang Qin

Baikal skullcap roots

Dosage 150g (in full batch)
Temperature Cold
Taste Bitter
Organ Affinity Gallbladder, Heart, Large Intestine, Lungs, Small Intestine, Spleen

Role in Niu Huang Jie Du Pian

Bitter and cold, it clears Heat and dries Dampness, drains Fire, and resolves toxins. It is especially effective at clearing Heat from the Lung and upper body, complementing Shi Gao and Da Huang to address Heat at multiple levels.
Assistants — Supports or moderates other herbs
Xiong Huang

Xiong Huang

Realgar

Dosage 50g (in full batch)
Temperature Warm
Taste Bitter, Pungent
Organ Affinity Stomach, Heart, Liver
Preparation Must be processed by water-levigation (水飞 shuǐ fēi) into extremely fine powder to reduce toxicity

Role in Niu Huang Jie Du Pian

Acrid and warm but strongly toxin-resolving, it clears Heat-toxin and reduces swelling. It specifically targets toxic swellings, sores, and abscesses. Despite its warm nature, its powerful detoxifying action reinforces the formula's ability to resolve Fire-toxin in cases of severe swelling and pain.
Bing Pian

Bing Pian

Borneol

Dosage 25g (in full batch)
Temperature Cool
Taste Bitter
Organ Affinity Spleen, Heart, Lungs
Preparation Ground separately and added to the blended powder

Role in Niu Huang Jie Du Pian

Acrid, bitter, and slightly cold, it clears Heat, relieves pain, reduces swelling, and opens orifices. It has a strong aromatic quality that helps direct the formula's actions to the head, eyes, mouth, and throat, and enhances the pain-relieving effect on inflamed tissues.
Jie Geng

Jie Geng

Platycodon roots

Dosage 100g (in full batch)
Temperature Neutral
Taste Bitter, Pungent
Organ Affinity Lungs

Role in Niu Huang Jie Du Pian

Bitter and acrid with a neutral thermal nature, it opens and disperses Lung Qi and benefits the throat. It acts as a "boat" herb that directs the formula's medicinal actions upward to the throat and head, where the symptoms of Heat-toxin most commonly manifest.
Envoy — Directs the formula to its target
Gan Cao

Gan Cao

Liquorice

Dosage 50g (in full batch)
Temperature Neutral
Taste Sweet
Organ Affinity Heart, Lungs, Spleen, Stomach

Role in Niu Huang Jie Du Pian

Sweet and neutral, it harmonizes all the other herbs in the formula, moderates the harsh cold and bitter properties of the other ingredients, and protects the Stomach from damage. It also clears Heat and resolves toxins in its own right, and soothes the throat.

Why This Combination Works

How the herbs in Niu Huang Jie Du Pian complement each other

Overall strategy

This formula addresses the pattern of intense Heat and toxin blazing internally and flaring upward to the head and face, causing painful swelling in the throat, gums, eyes, and mouth. The prescription strategy combines powerful Heat-clearing and toxin-resolving actions with a downward-draining mechanism to purge Heat through the bowels, while aromatic herbs guide the formula's effects to the affected areas in the upper body.

King herb

Niu Huang (Cattle Gallstone) is the King herb despite its small dosage, because its potency per gram is very high. It enters the Heart and Liver channels, clears Heat from the Heart, resolves Fire-toxin, and calms internal agitation. It directly addresses the root cause: toxic Heat accumulating in the interior and disturbing the upper orifices.

Deputy herbs

Three herbs serve as Deputies, providing the formula's main cooling and purging power. Sheng Shi Gao (Raw Gypsum), the largest ingredient by weight, is extremely cold and powerfully drains Stomach Fire, which is the primary source of gum swelling and mouth sores. Huang Qin (Scutellaria) clears Heat from the Lung and upper body, targeting throat inflammation and eye redness. Da Huang (Rhubarb) purges Heat downward through the bowels, giving the accumulated Heat-toxin an exit route and preventing it from continuing to rise to the face and head.

Assistant herbs

Xiong Huang (Realgar) is a reinforcing assistant that adds strong toxin-resolving power, particularly effective against severe swelling, sores, and abscesses. Bing Pian (Borneol) is an aromatic assistant that clears Heat, opens the orifices, and relieves pain directly in the affected areas of the mouth, throat, and eyes. Jie Geng (Platycodon) is a directing assistant that opens and disperses Lung Qi, guiding the formula's medicinal actions upward to the throat and head where symptoms concentrate.

Envoy herb

Gan Cao (Licorice) harmonizes the entire formula, moderating the intense cold and bitter properties of the other herbs to protect the Stomach. It also contributes its own mild Heat-clearing and toxin-resolving action and soothes inflamed throat tissues.

Notable synergies

Da Huang and Shi Gao work together to clear Heat from both the Stomach (Shi Gao) and the intestines (Da Huang), addressing Heat at its source while giving it a downward exit. Niu Huang and Xiong Huang combine cooling detoxification (Niu Huang) with warm-natured toxin resolution (Xiong Huang), creating a comprehensive anti-toxin effect. Jie Geng and Bing Pian together ensure the formula reaches the upper body orifices where symptoms manifest, with Jie Geng lifting the medicinals upward and Bing Pian penetrating the tissues directly.

How to Prepare

Traditional preparation instructions for Niu Huang Jie Du Pian

The modern tablet form (Pian) is prepared as follows: all eight ingredients are processed into fine powder. Xiong Huang (Realgar) is ground by water-levigation (水飞, shuǐ fēi) into an extremely fine powder to reduce toxicity and improve safety. Shi Gao, Da Huang, Huang Qin, Jie Geng, and Gan Cao are pulverized into fine powder. Niu Huang and Bing Pian are ground separately and then blended evenly with the other powders. The mixed powder is sieved, combined uniformly, and compressed into tablets of 0.25g or 0.3g each (small tablets) or 0.6g each (large tablets). Some versions are coated with a thin film or sugar coating.

Standard adult dosage for the small tablet (0.3g) is 3 tablets per dose, taken 2 to 3 times daily. For the large tablet (0.6g), the dosage is 2 tablets per dose, 2 times daily. Treatment should follow the principle of "stop once effective" (中病即止) and should generally not exceed one week. This formula should not be used long-term due to the arsenic content of Xiong Huang (Realgar).

Common Modifications

How practitioners adapt Niu Huang Jie Du Pian for specific situations

Added
Ban Lan Gen

15 - 30g, strongly resolves throat toxin

She Gan

6 - 9g, clears throat Heat and reduces swelling

Ban Lan Gen and She Gan are both specific for toxic throat swelling and reinforce the formula's ability to clear Fire-toxin from the throat area.

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

Contraindications

Situations where Niu Huang Jie Du Pian should not be used or requires extra caution

Avoid

Pregnancy. The formula contains Xiong Huang (realgar), Da Huang (rhubarb), and Bing Pian (borneol), all of which pose risks to fetal development. Classified as prohibited during pregnancy by China's National Medical Products Administration (NMPA).

Avoid

Breastfeeding. The NMPA explicitly lists breastfeeding women under the prohibited category due to the arsenic content of Xiong Huang (realgar) and its potential transfer through breast milk.

Avoid

Infants and toddlers (under 3 years old). Immature organ systems cannot safely metabolize the arsenic in realgar. The NMPA mandates that infants and toddlers must not use this product.

Avoid

Known allergy or hypersensitivity to any ingredient in the formula.

Avoid

Deficiency-Fire (Yin deficiency with Empty Heat rising). This formula targets excess-type Fire only. Using it for deficiency-type Heat patterns will further damage the body's Yin and Qi, worsening symptoms. Signs of deficiency-Fire include tidal fever, night sweats, sore throat without visible redness or swelling, and soft stools.

Avoid

Spleen and Stomach cold-deficiency patterns with loose stools. The formula is strongly cold in nature and will further damage the Spleen Yang, worsening diarrhea and digestive weakness.

Avoid

Long-term or excessive use. Xiong Huang (realgar) contains arsenic disulfide, which accumulates in the body. Cases of chronic arsenic poisoning have been reported with continuous use exceeding half a year, manifesting as skin darkening, hair loss, liver damage, and neurological symptoms.

Caution

Severe liver disease. The formula can burden liver metabolism. Patients with existing significant liver damage should use it only under strict medical supervision, if at all.

Caution

Chronic kidney disease. Impaired renal function may reduce arsenic excretion from the body, increasing the risk of accumulation and toxicity.

Caution

Concurrent use of other realgar-containing medicines (e.g. Liu Shen Wan, An Gong Niu Huang Wan). Taking multiple arsenic-containing preparations simultaneously increases the total arsenic load.

Caution

Constitutionally weak, elderly, or debilitated patients. The strongly cold and purgative nature of the formula can injure the Zheng Qi (overall vitality) in those who are already weakened.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

CONTRAINDICATED. China's National Medical Products Administration (NMPA) officially mandates that pregnant women must not use Niu Huang Jie Du Pian. The primary concerns are: 1. Xiong Huang (realgar/arsenic disulfide): Arsenic compounds are known teratogens that can cross the placental barrier and harm fetal development. 2. Da Huang (rhubarb): Has purgative and Blood-moving properties that can stimulate uterine contractions and increase the risk of miscarriage. 3. Bing Pian (borneol): A strong aromatic substance that promotes circulation, traditionally considered unsafe in pregnancy. There is no safe dosage during pregnancy. This formula must be completely avoided throughout all trimesters.

Breastfeeding

CONTRAINDICATED. The NMPA explicitly prohibits use during breastfeeding. The primary concern is Xiong Huang (realgar), whose arsenic metabolites can be excreted into breast milk and absorbed by the nursing infant. Infants have immature liver and kidney function and cannot effectively process or excrete arsenic, making even small amounts potentially harmful. Additionally, Da Huang (rhubarb) contains anthraquinone compounds that pass into breast milk and may cause diarrhea in the nursing infant. Breastfeeding mothers who need to clear Heat and resolve toxins should consult a practitioner for safer alternatives that do not contain mineral toxicants or strong purgatives.

Children

Infants and toddlers (under 3 years): PROHIBITED. China's NMPA explicitly bans use in this age group. Children aged 3 and older: No established pediatric safety data exists. The formula's strongly cold nature can easily damage a child's naturally delicate Spleen and Stomach. If a practitioner determines it is necessary for a child with clear excess-Heat signs, dosage must be significantly reduced (typically one-third to one-half of the adult dose depending on age and weight), and the duration must be kept as short as possible (1-2 days maximum). Close monitoring for diarrhea, abdominal pain, or skin rash is essential. The arsenic content from Xiong Huang (realgar) is of particular concern in children because their lower body weight means a higher dose-per-kilogram ratio, and their immature liver and kidney detoxification systems are less capable of processing and excreting arsenic.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Niu Huang Jie Du Pian

Cardiac glycosides (digoxin, digitoxin): Shi Gao (gypsum) and Niu Huang contain calcium ions that can synergize with cardiac glycosides, increasing myocardial contractility and the risk of digitalis toxicity and arrhythmia. Concurrent use should be avoided.

Tetracycline antibiotics: Calcium ions from Shi Gao (gypsum) can chelate with tetracyclines to form insoluble complexes in the gut, significantly reducing antibiotic absorption and effectiveness. Separate administration by at least 3 hours.

Fluoroquinolone antibiotics (norfloxacin, ofloxacin): Calcium from Shi Gao can form chelation complexes with these drugs, reducing their bioavailability and antibacterial efficacy. If both must be used, space them at least 2-3 hours apart.

Ferrous sulfate and other iron supplements: Xiong Huang (realgar) contains arsenic sulfide, which may react with iron salts to increase arsenic toxicity. Separation of at least 3 hours is advised.

Phenobarbital and other CNS depressants (morphine, chloral hydrate): Niu Huang (bovine bezoar) has inherent mild sedative properties and may potentiate central nervous system depression when combined with these drugs.

Enzyme preparations (digestive enzymes): The arsenic compounds in Xiong Huang (realgar) can bind to the active sites of enzyme preparations and inactivate them, reducing their therapeutic effect.

Sulfonamide antibiotics: Interaction with the mineral components may alter drug metabolism. Concurrent use is not recommended.

Isoniazid: May interact with the formula's mineral components. Separate by at least 3 hours if both are needed.

Usage Guidance

Practical advice for getting the most out of Niu Huang Jie Du Pian

Best time to take

After meals, 2-3 times daily, to reduce gastrointestinal irritation from the formula's cold and purgative nature.

Typical duration

Acute use only: 2-3 days, maximum 5-7 days. Stop as soon as symptoms improve ('stop when the condition resolves').

Dietary advice

While taking this formula, avoid spicy, fried, greasy, and heavily seasoned foods, as these generate internal Heat and directly oppose the formula's cooling action. Alcohol and tobacco should also be avoided. Favor cooling, mild foods such as fresh vegetables, pears, watermelon, mung bean soup, cucumber, and chrysanthemum tea. Drink plenty of warm or room-temperature water to support the body's elimination of Heat. Avoid excessively cold or raw foods despite the Heat pattern, as the formula itself is already very cold in nature. Adding large amounts of ice-cold food may further burden the Spleen and Stomach and cause diarrhea.

Niu Huang Jie Du Pian originates from Zhèng Zhì Zhǔn Shéng (《证治准绳》, Standards of Patterns and Treatments) by Wáng Kěn Táng Míng dynasty, 1602 CE

Classical Texts

Key passages from the classical Chinese medical texts that first described Niu Huang Jie Du Pian and its clinical use

From the classical indications (based on the original Niu Huang Jie Du Wan formula):

The formal indication recorded in the Chinese Pharmacopoeia states: 「清热解毒。用于火热内盛,咽喉肿痛,牙龈肿痛,口舌生疮,目赤肿痛。」
("Clears Heat and resolves toxins. Used for Fire-Heat blazing internally, with sore swollen throat, swollen painful gums, mouth and tongue sores, and red swollen painful eyes.")

The classical principle underlying this formula follows the teaching: 「热者寒之」 ("For Heat conditions, use cold [medicines]"), applying bitter-cold and sweet-cold medicinals to directly drain excess Fire-Heat from the Stomach and Lungs and guide it downward and outward.

Historical Context

How Niu Huang Jie Du Pian evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

The predecessor of Niu Huang Jie Du Pian is Niu Huang Jie Du Wan (牛黄解毒丸), a pill formulation with a long history. The earliest traceable source is debated among scholars: some sources attribute it to the Yuan Dynasty text Yan Hou Mai Zheng Tong Lun (《咽喉脉证通论》, "Comprehensive Discussion of Throat Conditions by Pulse and Pattern"), an anonymous work from over 700 years ago. Other sources cite the Ming Dynasty physician Xue Kai (薛铠) in his Bao Ying Cuo Yao (《保婴撮要》), or Wang Kentang (王肯堂) in the Zheng Zhi Zhun Sheng (《证治准绳》). The original pill also contained Zhu Sha (朱砂, cinnabar), which was later removed due to mercury toxicity concerns.

In 1952, Beijing Tong Ren Tang and Tianjin Da Ren Tang pharmaceuticals converted the traditional pill into a modern tablet form, creating what became one of the most iconic Chinese patent medicines of the 20th century. In 1973, the Tianjin formulation officially dropped cinnabar from the recipe and renamed the product Niu Huang Jie Du Pian. By 1988, natural bovine bezoar (Niu Huang) was largely replaced by synthetic (artificial) Niu Huang due to the extreme rarity and cost of the natural substance.

In 2019, China's NMPA mandated revised labelling for all Niu Huang Jie Du preparations, adding explicit warnings about arsenic toxicity risk from the realgar content and prohibiting use in pregnant women, breastfeeding women, and infants. A variant called Jing Zhi Niu Huang Jie Du Pian (京制牛黄解毒片), produced by Tong Ren Tang, removes realgar entirely and adds additional Heat-clearing herbs, offering a safer alternative with a somewhat different clinical profile.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Niu Huang Jie Du Pian

1

Bioaccessibility and excretion of arsenic in Niu Huang Jie Du Pian pills (Pharmacokinetic study, 2007)

Lai VW, Sun Y, Ting E, Cullen WR, Reimer KJ. Arsenic speciation in human urine: are we all the same? Toxicol Appl Pharmacol. 2007;222(3):292-298.

This study analyzed the arsenic content, bioavailability, and urinary excretion after a single ingestion of NHJD pills. Although each pill contained approximately 28 mg total arsenic (from realgar), only about 4% was bioavailable for absorption into the bloodstream. Urinary arsenic excretion showed two distinct peaks, indicating a complex absorption and metabolism pattern. The study demonstrated that realgar-bound arsenic has much lower bioavailability than free inorganic arsenic compounds.

PubMed
2

Toxicology Evaluation of Realgar-Containing Niu-Huang-Jie-Du Pian as Compared to Arsenicals in Cell Cultures and in Mice (Preclinical study, 2011)

Wu J, Shao Y, Liu J, Chen G, Ho PC. The medicinal use of realgar (As4S4) and its recent development as an anticancer agent. J Ethnopharmacol. 2011;135(3):595-602.

This study compared the toxicity of NHJD tablets with common arsenical compounds in cell cultures and mice. The LC50 for NHJD in cultured cells was 1200 μM, far higher than arsenite (35 μM) or arsenic trioxide (280 μM), demonstrating that realgar in its mineral form within the formula is much less acutely toxic than free arsenic species. In mice, liver and kidney injury was mild after NHJD exposure compared to arsenite or arsenate.

3

Use status and metabolism of realgar in Chinese patent medicine (Pharmacokinetic/survey study, 2015)

Li Y, Wang D, Xu Y, Liu B, Zheng Y, Yang B, Fan S, Zhi X, Zheng Q, Sun G. J Ethnopharmacol. 2015;168:165-170.

This study reviewed all realgar-containing patent medicines in China's database and studied arsenic metabolism in 10 volunteers who took four NHJD pills as directed. Among 191 realgar-containing patent medicines identified, 87% were for oral use. After ingestion, urinary arsenic metabolites confirmed that the body processes realgar-derived arsenic through methylation pathways. The findings support the need for strict dosage and duration controls.

4

Safety evaluation of Niuhuang Jiedu tablet (Review article, 2014)

Lu YF, Wu Q, Liang SX, Miao JW, Shi JS, Liu J. Evaluation of hepatotoxicity potential of NHJD. China Journal of Chinese Materia Medica. 2014;39(18):3560-3563.

This review summarized safety research on NHJD and argued that toxicity is dose-dependent and duration-dependent rather than inherent to any single dose. The authors noted that using total arsenic content as the sole safety index is inappropriate because the bioavailable fraction of realgar-bound arsenic is far lower than that of soluble arsenic compounds. The paper recommended rigorous modern scientific evaluation rather than outright removal of realgar from the classical formula.

PubMed

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.