Ban Lan Gen Chong Ji

Isatis Root Granules · 板蓝根冲剂

Also known as: Fufang Nan Ban Lan Gen Chong Ji (复方南板蓝根冲剂), Isatis Root Combination Instant Herbal Beverage, Ban Lan Gen Ke Li (板蓝根颗粒)

A widely used Chinese herbal granule formula for clearing Heat and toxins from the body, most commonly taken at the first sign of a cold or flu when sore throat is the main symptom. It contains three cooling, detoxifying herbs that work together to relieve throat pain, reduce fever, and support the body's immune response. Not suitable for colds with chills and clear runny nose (Wind-Cold type) or for people with weak, cold constitutions.

Origin Modern Chinese patent medicine (中成药). Based on traditional uses of Ban Lan Gen recorded in texts such as the Xin Xiu Ben Cao (新修本草, Tang dynasty) and later materia medica. The granule formulation was developed in modern China as an over-the-counter preparation. — Modern era (20th century formulation)
Composition 3 herbs
Ban Lan Gen
King
Ban Lan Gen
Pu Gong Ying
Deputy
Pu Gong Ying
Zi Hua Di Ding
Deputy
Zi Hua Di Ding
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. Ban Lan Gen Chong Ji is designed to correct these specific patterns.

Why Ban Lan Gen Chong Ji addresses this pattern

This is the primary pattern addressed by the formula. Heat-toxin (热毒) refers to a state where pathogenic Heat has become intense and concentrated, producing toxic effects such as high fever, severe sore throat, swollen glands, and inflamed skin lesions. All three herbs in Ban Lan Gen Chong Ji are cold in nature and specialize in clearing Heat and resolving toxins. Nan Ban Lan Gen targets Heat-toxin in the Heart and Stomach channels (which govern the throat), while Pu Gong Ying and Zi Hua Di Ding extend the toxin-clearing action to the Liver channel and body surface. The formula's entire composition is designed to cool and purge this toxic Heat from the body.

A practitioner would look for one or more of these signs

Sore Throat

Pronounced soreness, redness, and swelling of the throat

Fever

High fever with aversion to heat rather than cold

Swollen Limbs

Swollen and painful lymph nodes or parotid glands

Boils

Red, hot, painful skin sores or abscesses

Sore

Oral ulcers with burning pain

Thirst

Thirst with desire for cold drinks

Commonly Prescribed For

These conditions can arise from the patterns above. A practitioner would consider Ban Lan Gen Chong Ji when these conditions are specifically caused by those patterns — not for all cases of these conditions.

TCM Interpretation

In TCM, the common cold is not a single disease but a group of patterns caused by external pathogenic factors. The Wind-Heat type occurs when Wind and Heat invade the body's exterior and the Lung system. The Lung controls the throat and nose, so when Heat lodges there, it produces sore throat, nasal congestion with yellow discharge, fever that exceeds any chills, and thirst. The key distinction is that this is a Heat pattern, not a Cold pattern. People with a Wind-Cold type cold (strong chills, runny clear mucus, body aches, no sore throat) should not use this formula, as its cold nature would worsen their condition.

Why Ban Lan Gen Chong Ji Helps

Ban Lan Gen Chong Ji works because all three of its herbs are cold in nature and specialize in clearing Heat-toxins. Nan Ban Lan Gen directly targets the Lung and Stomach channels, relieving the inflamed throat and reducing fever. Pu Gong Ying helps drain Heat and reduce any associated headache or eye redness. Zi Hua Di Ding adds further toxin-resolving power. This formula is particularly well-suited to colds where the sore throat is the most prominent and distressing symptom, a sign that Heat-toxin has concentrated in the throat region.

Also commonly used for

Tonsillitis

Acute tonsillitis with inflammation and swelling

Lumps

Epidemic parotitis (mumps) with parotid gland swelling

Boils

Skin boils, sores, and abscesses from Heat-toxin

Stomatitis

Oral inflammation and mouth ulcers

Bronchitis

Acute bronchitis with Heat signs

Viral Conjunctivitis

Acute conjunctivitis (red eyes) from Heat-toxin

What This Formula Does

Every TCM formula has a specific set of actions — here's what Ban Lan Gen Chong Ji does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Ban Lan Gen Chong Ji is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Ban Lan Gen Chong Ji 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 Ban Lan Gen Chong Ji works at the root level.

Ban Lan Gen Chong Ji addresses conditions where external Heat-Toxin (热毒, rè dú) invades the body, particularly through the Lung-defensive layer and settling in the Heart and Stomach channels. In TCM theory, the Lungs govern the surface of the body and the throat. When external pathogenic Heat or epidemic Toxin (温毒, wēn dú) attacks, it first assaults the defensive Qi and the Lung system, producing fever, sore throat, and headache. If the Heat intensifies, it can penetrate into the Blood level, causing skin rashes (发斑) and high fever with restlessness.

The throat is considered a gateway jointly governed by the Lung and Stomach systems. When Heat-Toxin accumulates in the Lung and Stomach, the throat becomes red, swollen, and painful. This is described clinically as "Lung-Stomach Heat excess" (肺胃热盛). The same mechanism underlies conditions such as mumps (痄腮), where Heat-Toxin concentrates in the Shaoyang channel causing glandular swelling, and epidemic febrile conditions like "big head plague" (大头瘟) with severe facial swelling.

Ban Lan Gen's bitter and cold nature directly counters this pathomechanism: its bitter flavour drains Fire and dries dampness, while its cold nature quenches Heat. By entering the Heart and Stomach channels, it targets the core locations where Heat-Toxin lodges, clearing the Toxin, cooling the Blood to prevent rashes, and relieving the throat to reduce swelling and pain.

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 with a slightly sweet undertone from the sucrose excipient. The bitter taste drives its Heat-clearing and toxin-resolving action, entering and draining Fire from the Heart and Stomach.

Channels Entered

Ingredients

3 herbs

The herbs that make up Ban Lan Gen Chong Ji, 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
Ban Lan Gen

Ban Lan Gen

Woad roots

Dosage 15 - 30g
Temperature Cold
Taste Bitter
Organ Affinity Stomach, Liver

Role in Ban Lan Gen Chong Ji

The principal herb of this formula. Nan Ban Lan Gen (Southern Isatis root) is bitter and cold, entering the Heart and Stomach channels. It powerfully clears Heat, resolves Fire toxins, and cools the Blood. As the namesake and chief ingredient, it directly targets the primary pathomechanism of Heat-toxin accumulation in the Lung and Stomach, relieving sore throat, fever, and swollen glands.
Deputies — Assists and enhances the King
Pu Gong Ying

Pu Gong Ying

Dandelions

Dosage 10 - 15g
Temperature Cold
Taste Bitter, Sweet
Organ Affinity Liver, Stomach

Role in Ban Lan Gen Chong Ji

Pu Gong Ying (Dandelion herb) is bitter, sweet, and cold, entering the Liver and Stomach channels. It reinforces the King herb's Heat-clearing and toxin-resolving actions while adding its own strength in dispersing swellings and abscesses. It also clears Liver Heat and helps drain Heat downward through its mild diuretic quality, broadening the formula's ability to address boils, sores, and toxic swellings beyond the throat.
Zi Hua Di Ding

Zi Hua Di Ding

Tokyo violets

Dosage 10 - 15g
Temperature Cold
Taste Bitter, Pungent
Organ Affinity Heart, Liver

Role in Ban Lan Gen Chong Ji

Zi Hua Di Ding (Viola herb) is bitter, acrid, and cold, entering the Heart and Liver channels. It strongly clears Heat and resolves Fire toxins, with a particular affinity for treating skin sores, boils, and deep-seated toxic swellings. Working alongside Ban Lan Gen and Pu Gong Ying, it strengthens the formula's toxin-clearing and swelling-reducing capacity, especially for cases where Heat toxins manifest on the body surface.

Why This Combination Works

How the herbs in Ban Lan Gen Chong Ji complement each other

Overall strategy

This formula assembles three potent Heat-clearing, toxin-resolving herbs to create a concentrated assault on Heat-toxin (热毒) accumulation in the upper body, particularly the throat, head, and skin. The strategy is straightforward: combine herbs that overlap in their core action (clearing Heat and resolving toxins) but each bring a slightly different strength, resulting in a formula more powerful than any single herb alone.

King herbs

Nan Ban Lan Gen serves as the King herb. It is the formula's namesake and backbone, directly clearing Heat-toxin from the Heart and Stomach channels. Its strength lies in cooling the Blood, relieving sore throat, and addressing the core pattern of Heat-toxin invading the upper body during infectious febrile diseases. It is the herb most associated with treating epidemic febrile illness in the Chinese herbal tradition.

Deputy herbs

Pu Gong Ying (Dandelion) reinforces the King's toxin-clearing action while adding an ability to disperse swellings and nodules, particularly abscesses and boils. It also mildly clears Liver Heat, which is relevant when fever causes red, irritated eyes or headache. Zi Hua Di Ding (Viola) further amplifies the formula's toxin-resolving power, with special strength against deep skin sores and boils. Together with the King, these two deputies create a three-pronged attack on Heat-toxins throughout the body.

Notable synergies

The combination of Pu Gong Ying and Zi Hua Di Ding is a classical pairing (often seen together in Wu Wei Xiao Du Yin) specifically recognized for its synergistic effect on resolving toxic swellings and abscesses. Within this formula, they work together to extend the reach of Ban Lan Gen beyond the throat to address boils, skin infections, and mumps-related swelling.

How to Prepare

Traditional preparation instructions for Ban Lan Gen Chong Ji

Ban Lan Gen Chong Ji is a modern granule preparation (冲剂). It is not prepared as a traditional decoction at home. The herbs are extracted industrially, concentrated, and formed into soluble granules mixed with cane sugar as an excipient.

To use: dissolve the contents of one packet (typically 10g) in one cup of freshly boiled water. Stir until fully dissolved and allow to cool to a comfortable drinking temperature. Take 3 times daily as needed. It is best taken after meals to minimize any stomach irritation from the cold nature of the herbs.

Do not use for more than 3 consecutive days without professional guidance. Avoid concurrent use with tonic or warming herbs, as these may counteract the formula's cooling action.

Common Modifications

How practitioners adapt Ban Lan Gen Chong Ji for specific situations

Added
She Gan

She Gan 6-9g, clears Heat from the throat and disperses swelling

Shan Dou Gen

Shan Dou Gen 6-9g, powerfully clears Lung and Stomach Heat-toxin from the throat

She Gan and Shan Dou Gen are specific throat-targeting herbs that strengthen the formula's action when tonsillitis is severe with purulent exudate, indicating concentrated Heat-toxin in the throat.

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

Contraindications

Situations where Ban Lan Gen Chong Ji should not be used or requires extra caution

Avoid

Wind-Cold pattern colds (aversion to cold, runny nose with clear discharge, absence of sore throat). Ban Lan Gen Chong Ji is only appropriate for Heat-pattern conditions and will be ineffective or potentially worsening for Cold-type illnesses.

Avoid

Spleen and Stomach deficiency Cold (chronic loose stools, poor appetite, cold limbs, fatigue). The bitter and cold nature of Ban Lan Gen can further injure the digestive system in those with underlying Spleen-Stomach weakness.

Avoid

Deficiency constitution without genuine Heat-Toxin. The formula should not be used as a general health tonic or taken long-term for prevention by people without active Heat signs.

Avoid

Known allergy or hypersensitivity to Ban Lan Gen (Isatis root). Allergic reactions including skin rashes and, in rare cases with injectable forms, anaphylaxis have been reported.

Caution

Diabetes patients should be cautious due to the sucrose content in the granule formulation. Sugar-free versions should be sought when available.

Caution

Patients with chronic liver, kidney, or cardiovascular disease should use only under professional guidance.

Caution

Should not be taken concurrently with tonifying (supplementing) Chinese medicines, as these have opposing therapeutic directions.

Caution

Elderly or physically weak individuals should exercise caution. Prolonged use in these populations can cause appetite loss, fatigue, and cold sensations due to the formula's strongly cold nature.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Use with caution during pregnancy and only under professional guidance. There is no definitive evidence that Ban Lan Gen (Isatis root) is directly harmful during pregnancy, but its strongly cold and bitter nature raises theoretical concerns about injuring the Spleen-Stomach and potentially affecting fetal nourishment. One animal study has reported mutagenic activity (increased micronuclei in mouse bone marrow and sperm abnormalities), though clinical significance in humans is unknown. The official product label for Ban Lan Gen granules lists pregnant women among those who should only take it under a physician's direction. As a precaution, avoid use during the first trimester unless clearly necessary, and keep any course of treatment as short as possible.

Breastfeeding

Opinions vary on use during breastfeeding. Some Chinese clinical sources state that Ban Lan Gen granules may be used during breastfeeding for wind-heat colds, suggesting that the herb components in breast milk are minimal and unlikely to significantly affect the infant. However, other pharmacists advise against routine use during lactation because most drugs can be excreted in breast milk, and an infant's immature metabolic system may not clear the compounds efficiently. As a prudent approach: short-term use at standard doses is likely acceptable if genuinely needed for Heat-pattern symptoms, but avoid prolonged or high-dose use. It is advisable to wait 2 to 3 hours after taking the granules before nursing. Always consult a healthcare provider before use during breastfeeding.

Children

Ban Lan Gen Chong Ji can be used in children but requires dose reduction and caution. For flu and epidemic disease prevention in school-age children, the official dosage suggestion is 5 to 10 grams once or twice daily for 3 days. Children's digestive systems are immature and their Spleen-Stomach Qi is not yet fully developed, making them more susceptible to the cold, bitter properties of this formula. Prolonged or excessive use in children has been associated with adverse effects including gastrointestinal disturbance, upper digestive tract bleeding, and reductions in white blood cell count. Do not use as a daily health drink or long-term preventive in children. Always adjust dose according to the child's age and body weight. Use in infants and toddlers should be under direct medical supervision.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Ban Lan Gen Chong Ji

Antipyretic/analgesic drugs (e.g. ibuprofen, acetaminophen): Since Ban Lan Gen Chong Ji has inherent fever-reducing and anti-inflammatory properties, concurrent use with pharmaceutical antipyretics may have additive effects. Product guidelines recommend spacing doses by 1 to 2 hours to avoid overlapping effects.

CYP3A4 substrate drugs: Indirubin, one of the active compounds in Isatis root, has been shown in laboratory studies to activate CYP3A4 gene transcription via the pregnane X receptor (PXR). While the clinical relevance remains uncertain, this raises a theoretical concern that Ban Lan Gen could alter the metabolism of drugs processed by CYP3A4 (such as certain statins, immunosuppressants like cyclosporine, and some calcium channel blockers). Patients on such medications should consult their healthcare provider.

Tonifying or supplementing Chinese herbal medicines: The product label advises against concurrent use with tonifying herbal formulas, as the strongly clearing and purging nature of Ban Lan Gen opposes the therapeutic direction of supplementing medicines.

Aspirin and salicylate-containing drugs: Isatis contains chemicals structurally similar to aspirin. People with aspirin allergy or sensitivity may experience allergic reactions or asthma when taking Ban Lan Gen.

Usage Guidance

Practical advice for getting the most out of Ban Lan Gen Chong Ji

Best time to take

After meals to reduce potential gastrointestinal irritation, dissolved in hot water, 3 times daily.

Typical duration

Acute use: 3 to 5 days for active symptoms; for flu prevention: 5 days maximum. Do not use long-term.

Dietary advice

While taking this formula, avoid spicy, greasy, fried, and hot-natured foods (such as chili peppers, deep-fried dishes, lamb, and alcohol), as these can generate additional internal Heat and counteract the formula's cooling effect. Also avoid tobacco and strong alcohol. Cold and raw foods should be consumed in moderation, as the formula is already cold in nature and adding more cold foods may further tax the digestive system. Light, easily digestible meals are preferred, such as congee, steamed vegetables, and fresh fruit. Stay well hydrated with warm water to support the body's recovery from Heat-Toxin conditions.

Ban Lan Gen Chong Ji originates from Modern Chinese patent medicine (中成药). Based on traditional uses of Ban Lan Gen recorded in texts such as the Xin Xiu Ben Cao (新修本草, Tang dynasty) and later materia medica. The granule formulation was developed in modern China as an over-the-counter preparation. Modern era (20th century formulation)

Classical Texts

Key passages from the classical Chinese medical texts that first described Ban Lan Gen Chong Ji and its clinical use

《本草便读》(Běn Cǎo Biàn Dú) by Zhang Bingcheng (清代):

「板蓝根即靛青根,其功用性味与靛青叶同,能入肝胃血分,不过清热、解毒、辟疫、杀虫四者而已。但叶主散,根主降,此又同中之异耳。」

"Ban Lan Gen is the root of the indigo plant. Its actions and flavour-nature are the same as the indigo leaf: it enters the Liver and Stomach at the Blood level, and its effects amount to clearing Heat, resolving Toxins, warding off epidemics, and killing parasites. The difference is that the leaf tends to disperse, while the root tends to descend."


《日华子本草》(Rì Huá Zǐ Běn Cǎo):

「治天行热毒。」

"Treats seasonally transmitted Heat-Toxin disorders."


《分类草药性》(Fēn Lèi Cǎo Yào Xìng):

「解诸毒恶疮,散毒去火,捣汁或服或涂。」

"Resolves all manner of toxic sores, disperses Toxins and eliminates Fire. Pound to extract the juice, which may be taken internally or applied externally."

Historical Context

How Ban Lan Gen Chong Ji evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

The medicinal use of "blue" (蓝) plants in China stretches back to the Qin-Han period, when various species of indigo-producing plants were used as dyes and medicines. The herb Ban Lan Gen was first officially recorded in the Tang Dynasty text Xin Xiu Běn Cǎo (《新修本草》, also known as the Tang Materia Medica, 659 CE), making it one of the world's earliest pharmacopoeia entries for this plant. The name "Ban Lan Gen" itself first appeared in the Song Dynasty formula collection Tài Píng Shèng Huì Fāng (《太平圣惠方》), specifically in a formula called Hǔ Zhǎng Wán (虎掌丸).

Over the Jin-Yuan and Ming-Qing periods, Ban Lan Gen became a mainstream Heat-clearing herb, frequently appearing in formulas for epidemic diseases. It features prominently in the famous Pǔ Jì Xiāo Dú Yǐn (普济消毒饮) from Li Dongyuan's Dōng Yuán Shì Xiào Fāng, used for "big head plague" with facial swelling and throat pain. In the modern era, Ban Lan Gen became a household name in China. During the 1988 Shanghai hepatitis A outbreak, the 2003 SARS crisis, and subsequent influenza pandemics (H1N1, H7N9), it was purchased en masse by the public as a preventive measure, earning it the popular (if somewhat exaggerated) reputation as a "miracle cure-all." The granule formulation (冲剂/颗粒) was developed in modern pharmaceutical manufacturing to make this traditional remedy more convenient, and it has been included in successive editions of the Chinese Pharmacopoeia.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Ban Lan Gen Chong Ji

1

Comprehensive review of Isatis indigotica phytochemistry, pharmacology, and clinical applications (Review, 2021)

Chen Q, Lan HY, Peng W, Rahman K, Liu QC, Luan X, Zhang H. Journal of Pharmacy and Pharmacology, 2021, 73(9): 1137-1150.

This systematic review summarized that Isatis indigotica root contains alkaloids, organic acids, flavonoids, lignans, and amino acids, and demonstrates antiviral, antibacterial, immunoregulatory, anti-inflammatory, and cholagogic effects in laboratory settings. It can inhibit influenza, hepatitis B, mumps, herpes simplex, and other viruses. Clinical reports cited in the review noted that isatis root granules showed a 98% effective rate for upper respiratory tract infections compared to 80% for ribavirin alone, though the authors acknowledged that rigorous evidence-based clinical trials were still lacking.

Link
2

Randomized controlled trial protocol: Ban-Lan-Gen granules for seasonal influenza (RCT protocol, 2015)

Yang Z, Wang Y, Zheng Y, Zhao S, et al. Trials, 2015, 16:126.

This published protocol described the first randomized, double-blind, oseltamivir- and placebo-controlled clinical trial designed to evaluate Ban Lan Gen granules for treating seasonal influenza A and B. The trial planned to recruit 177 subjects and measure symptom resolution, viral clearance, and safety outcomes over a 5-day treatment period. Preclinical data cited in the protocol showed that Isatis root polysaccharides and clemastanin B could inhibit various influenza virus subtypes in vitro by interfering with viral hemagglutinin.

PubMed
3

Effect of indigowood root (Isatis indigotica) on radiation-induced mucositis (Small RCT, 2009)

Tsai YS, et al. Journal of Alternative and Complementary Medicine, 2009, 15(6): 721-728.

This small randomized trial of 20 head and neck cancer patients receiving radiotherapy found that prophylactic gargling and swallowing of an Isatis root preparation significantly reduced the severity of radiation-induced oral mucositis (p=0.01), anorexia (p=0.002), and swallowing difficulty (p=0.002) compared to saline controls. Serum interleukin-6 levels were also significantly lower in the treatment group, suggesting an anti-inflammatory mechanism.

PubMed
4

Antinociceptive, anti-inflammatory and antipyretic effects of Isatis indigotica root (Preclinical study, 2002)

Ho YL, Chang YS. American Journal of Chinese Medicine, 2002, 30(2-3): 193-200.

This laboratory study evaluated methanolic extracts of Isatis root in animal models. The extract significantly and dose-dependently reduced pain responses in mice, decreased carrageenan-induced paw edema in rats, and potently attenuated fever induced by lipopolysaccharide (endotoxin), providing pharmacological support for the traditional uses of Ban Lan Gen in febrile and inflammatory conditions.

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.