Gua Lou Xie Bai Ban Xia Tang

Trichosanthes Fruit, Chinese Chive, and Pinellia Decoction · 瓜蔞薤白半夏湯

Also known as: Gua Lou Xie Bai Tang (瓜蒌薤白汤), Gua Lou Ban Xia Bai Jiu Tang (瓜蒌半夏白酒汤), Kua Lou Xie Bai Ban Xia Tang (栝蒌薤白半夏汤)

A classical formula for chest pain that radiates to the back, difficulty breathing, and inability to lie flat, caused by phlegm blocking the chest. Originally recorded by Zhang Zhongjing for a condition called 'chest obstruction,' it works by clearing away accumulated phlegm, restoring warmth and openness to the chest, and directing Qi downward. In modern practice it is most commonly used alongside conventional treatment for coronary heart disease and angina.

Origin Jin Gui Yao Lue (Essential Prescriptions from the Golden Cabinet) by Zhang Zhongjing, Chapter 9: Xiong Bi Xin Tong Duan Qi Bing Mai Zheng Bing Zhi (Chest Obstruction, Heart Pain, and Shortness of Breath) — Eastern Hàn dynasty, circa 200 CE
Composition 4 herbs
Gua Lou
King
Gua Lou
Xie Bai
Deputy
Xie Bai
Ban Xia
Assistant
Ban Xia
Bai Ji
Envoy
Bai Ji
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. Gua Lou Xie Bai Ban Xia Tang is designed to correct these specific patterns.

Why Gua Lou Xie Bai Ban Xia Tang addresses this pattern

When abundant phlegm turbidity accumulates in the chest, it blocks the flow of Yang Qi through the upper body, causing the classical condition called Xiong Bi (chest obstruction). The chest Yang becomes suppressed, and turbid Yin takes over the space where clear Yang should reign. This formula directly attacks this pathomechanism: Gua Lou dissolves the accumulated phlegm, Xie Bai restores the warmth of chest Yang, Ban Xia dries the dampness that generates more phlegm and pushes rebellious Qi back downward, while Bai Jiu carries the formula to the chest and enhances its dispersing power. The result is that phlegm is cleared, Yang is restored, and the chest opens again.

A practitioner would look for one or more of these signs

Chest Pain

Chest pain that radiates through to the back

Difficulty Lying Down

Unable to lie flat due to chest fullness

Shortness Of Breath

Shortness of breath, worse on exertion

Copious Sputum

Copious sticky white phlegm

Chest Stiffness

A feeling of fullness and oppression in the chest

Back Pain

Upper back pain associated with chest obstruction

Commonly Prescribed For

These conditions can arise from the patterns above. A practitioner would consider Gua Lou Xie Bai Ban Xia Tang when these conditions are specifically caused by those patterns — not for all cases of these conditions.

Arises from: Phlegm Phlegm

TCM Interpretation

In TCM, angina pectoris falls under the category of Xiong Bi (chest obstruction) and Xin Tong (Heart pain). The fundamental mechanism involves the Heart's Yang Qi becoming insufficient or obstructed, allowing turbid phlegm, cold, or Blood stasis to block the chest vessels. When the obstruction is primarily due to phlegm turbidity, the patient presents with a heavy, oppressive chest pain that radiates to the back, often with a greasy tongue coating and a wiry pulse. The condition tends to worsen after meals, with exertion, or in cold and damp weather, all of which increase the phlegm burden. The Jin Gui Yao Lue describes the core pulse picture as 'Yang faint, Yin wiry,' meaning the Yang pulse position is weak (indicating deficient chest Yang) while the Yin position is taut (indicating the presence of pathogenic Yin such as phlegm or cold).

Why Gua Lou Xie Bai Ban Xia Tang Helps

This formula directly addresses the phlegm-dominant type of angina. Gua Lou dissolves and expels the phlegm that is obstructing the chest vessels, while Xie Bai warms and unblocks the chest Yang that has been suppressed. Ban Xia intensifies the phlegm-resolving effect and descends the rebellious Qi that causes the suffocating chest pressure. Modern pharmacological research has confirmed that the formula can improve coronary blood flow, regulate blood lipids, reduce blood viscosity, and protect against ischemia-reperfusion injury. A systematic review of randomized controlled trials found that the formula, used alone or combined with conventional medications, improved angina symptoms and ECG findings in patients with stable angina.

Also commonly used for

Intercostal Neuralgia

Intercostal nerve pain with chest fullness and difficulty breathing

Chronic Obstructive Pulmonary Disease

COPD with phlegm obstruction and chest tightness

Arrhythmia

Arrhythmias associated with phlegm obstruction pattern

Costochondritis

Non-suppurative costochondritis with chest wall pain

Breast Lumps

Breast lumps and fibrocystic changes related to phlegm accumulation

Rheumatic Heart Disease

Rheumatic heart disease with chest pain and dyspnea

Chronic Cholecystitis

Chronic cholecystitis with upper abdominal and chest fullness

What This Formula Does

Every TCM formula has a specific set of actions — here's what Gua Lou Xie Bai Ban Xia Tang does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Gua Lou Xie Bai Ban Xia Tang is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Gua Lou Xie Bai Ban Xia Tang 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 Gua Lou Xie Bai Ban Xia Tang works at the root level.

This formula addresses a condition the classical texts call xiong bi (胸痹), or "chest obstruction" — a more severe form of chest pain caused by the blockage of Yang Qi in the upper body, particularly in the chest region where the Heart and Lungs reside.

In TCM theory, the chest is considered the "residence of Yang Qi" — a space that should be open, warm, and freely circulating. When a person's chest Yang becomes weak or insufficient, cold and turbid Yin substances (particularly Phlegm and cold-Dampness) can accumulate and obstruct this area. This creates a vicious cycle: weakened Yang fails to transform fluids, fluids congeal into Phlegm, and Phlegm further blocks Yang circulation. The classical commentator Yu Jia Yan (喻嘉言) described the chest as "like an open sky where Yang Qi shines like the sun overhead — if earthly Qi (turbid Yin) rises up, it becomes congested and blocked." When this obstruction becomes severe enough, it produces chest pain that radiates through to the back, a feeling of tightness and oppression, difficulty lying flat (because lying down allows turbid Phlegm to press upward against the chest), and sometimes breathlessness with copious phlegm.

This pattern represents a progression beyond the milder Gua Lou Xie Bai Bai Jiu Tang presentation. Here, the Phlegm component is heavier and more copious, making the obstruction more intense. The addition of Ban Xia specifically targets this excess Phlegm and the upward counterflow of Qi that prevents the patient from lying down. In modern clinical practice, this pattern corresponds closely to coronary heart disease with angina pectoris, particularly in patients who also have significant phlegm or metabolic syndrome features.

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

Warm

Taste Profile

Predominantly pungent and bitter with underlying sweetness — pungent to open and disperse obstruction, bitter to direct downward and transform Phlegm, sweet to moisten and harmonize.

Ingredients

4 herbs

The herbs that make up Gua Lou Xie Bai Ban Xia Tang, 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
Gua Lou

Gua Lou

Snake gourds

Dosage 12 - 24g
Temperature Cold
Taste Sweet
Organ Affinity Large Intestine, Lungs, Stomach
Preparation Crushed before decocting (捣)

Role in Gua Lou Xie Bai Ban Xia Tang

Opens the chest and expels phlegm, loosens chest tightness and disperses clumps. As the principal herb, it directly addresses the core problem of phlegm turbidity blocking the chest, using its sweet, cold, and slippery nature to clear and dissolve phlegm accumulation while broadening the chest.
Deputy — Assists and enhances the King
Xie Bai

Xie Bai

Long-stamen onion bulbs

Dosage 9 - 12g
Temperature Warm
Taste Bitter, Pungent
Organ Affinity Large Intestine, Lungs, Stomach

Role in Gua Lou Xie Bai Ban Xia Tang

Warms and unblocks the chest Yang, disperses cold and stagnation. Its pungent, warm, and slippery nature penetrates through congestion to restore the free flow of Yang Qi in the upper body. It directly supports Gua Lou by warming what Gua Lou clears, ensuring both the phlegm and the underlying cold stagnation are addressed.
Assistant — Supports or moderates other herbs
Ban Xia

Ban Xia

Crow-dipper rhizomes

Dosage 9 - 15g
Temperature Warm
Taste Pungent
Organ Affinity Lungs, Spleen, Stomach

Role in Gua Lou Xie Bai Ban Xia Tang

Dries dampness, transforms phlegm, descends rebellious Qi, and disperses clumps. This herb was specifically added to the parent formula (Gua Lou Xie Bai Bai Jiu Tang) to address more severe phlegm accumulation. Its downward-directing quality counteracts the upward surging of turbid Qi that prevents the patient from lying down, and it also promotes sleep.
Envoy — Directs the formula to its target
Bai Ji

Bai Ji

Bletilla rhizomes

Dosage 30 - 70ml
Temperature Cold
Taste Bitter, Sweet
Organ Affinity Stomach, Liver, Lungs
Preparation Used as part of the cooking liquid along with water. Modern practice often substitutes Huang Jiu (yellow rice wine) or fermented rice water (Lao Zao).

Role in Gua Lou Xie Bai Ban Xia Tang

Acts as a warm, pungent carrier that directs the formula upward to the chest, unblocks Yang, and helps disperse stagnation. The wine also serves as a solvent that enhances the extraction of active constituents from the other herbs. In classical usage this referred to a low-alcohol rice wine (similar to modern Huang Jiu or fermented rice), not modern distilled spirits.

Why This Combination Works

How the herbs in Gua Lou Xie Bai Ban Xia Tang complement each other

Overall strategy

This formula targets severe chest obstruction (Xiong Bi) caused by phlegm turbidity blocking the chest and suppressing Yang Qi. The strategy is to clear phlegm from above, warm and unblock the chest Yang, and redirect rebellious Qi downward so the patient can breathe freely and lie flat again.

King herb

Gua Lou (Trichosanthes fruit) serves as King because it directly addresses the phlegm congestion at the root of the obstruction. Its sweet, cold, slippery nature expels accumulated phlegm and broadens the chest. It is used in substantial dosage (one whole fruit in the original text) because the phlegm stagnation in this pattern is severe.

Deputy herb

Xie Bai (Chinese chive bulb) complements Gua Lou by warming what Gua Lou clears. While Gua Lou dissolves phlegm, Xie Bai uses its pungent warmth to unblock the Yang of the chest and disperse cold stagnation. Together, they form the core pair for treating chest obstruction with phlegm, a combination Zhang Zhongjing used across all three of his chest obstruction formulas.

Assistant herb

Ban Xia (Pinellia) is a reinforcing assistant that intensifies the phlegm-resolving effect. It dries dampness, transforms sticky phlegm, and critically descends rebellious Qi. The Yi Zong Jin Jian notes that this formula treats cases where pain is so severe that Qi surges upward, and Ban Xia specifically counters this upward rebellion. Liu Duzhou also highlighted Ban Xia's ability to harmonize Yin and Yang, helping the patient sleep, which directly addresses the chief symptom of being unable to lie flat.

Envoy herb

Bai Jiu (rice wine) is light and dispersing, carrying the other herbs upward to the chest where they are needed. Its warm, pungent nature further assists in unblocking Yang and warming the channels. It also acts as a solvent, helping extract constituents from the herbs that water alone cannot dissolve effectively.

Notable synergies

Gua Lou and Xie Bai are the defining herb pair of the chest obstruction formula family. Gua Lou clears and loosens phlegm from above while Xie Bai warms and opens from within; together they open the chest far more effectively than either alone. Xie Bai and Ban Xia together create a powerful drying and descending combination that addresses both the dampness generating the phlegm and the upward rebellious Qi it causes.

How to Prepare

Traditional preparation instructions for Gua Lou Xie Bai Ban Xia Tang

Crush the Gua Lou (Trichosanthes fruit). Combine all four ingredients with the rice wine (approximately 2000 ml in the original text, reduced to 500 ml in modern practice). Bring to a boil and decoct until the liquid is reduced by roughly half to two-thirds. Strain and divide into three portions. Take one portion warm, three times daily.

In modern clinical practice, the herbs may be decocted in a mixture of water and Huang Jiu (yellow rice wine, 30–70 ml), or the wine component can be replaced with fermented rice water (Lao Zao). Alcohol may be omitted if contraindicated, though it reduces the formula's dispersing action.

Common Modifications

How practitioners adapt Gua Lou Xie Bai Ban Xia Tang for specific situations

Added
Dan Shen

15 - 20g, activates Blood and dispels stasis in the Heart vessels

Chuan Xiong

6 - 9g, moves Blood and promotes Qi circulation

Hong Hua

6 - 9g, activates Blood and opens the channels

Chest obstruction often involves both phlegm and Blood stasis. Adding Blood-moving herbs addresses the stasis component, which the base formula does not directly target.

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

Contraindications

Situations where Gua Lou Xie Bai Ban Xia Tang should not be used or requires extra caution

Avoid

Chest pain due to Phlegm-Heat or Yin deficiency with Heat signs. This formula is warming and drying in nature, designed for cold-Phlegm obstruction. Using it in Heat patterns would aggravate the condition.

Avoid

True Yin deficiency of the Heart and Kidneys. The drying and dispersing nature of Ban Xia and Xie Bai can further deplete Yin fluids. If Yin deficiency is prominent, nourishing Yin herbs should be prioritized instead.

Caution

Patients with a history of alcohol sensitivity or liver disease should use caution, as the original formula calls for Bai Jiu (rice wine) as a vehicle. The wine component can be reduced or omitted in these cases.

Caution

Long-term unsupervised use. This is a formula for an active, relatively acute condition. Once chest obstruction symptoms resolve, the formula should be discontinued or modified to address root causes.

Caution

Patients with dry stools or pre-existing fluid depletion. Gua Lou (Trichosanthes fruit) has a lubricating, downward-moving quality that is generally beneficial, but Ban Xia's drying properties may worsen dryness if fluids are already depleted.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Use with caution during pregnancy. Ban Xia (Pinellia) is traditionally listed among herbs cautioned against in pregnancy due to its potent downward-directing and dispersing actions, and some classical texts include it in the list of pregnancy-incompatible substances. Gua Lou (Trichosanthes fruit) also has a slippery, downward-moving quality that may theoretically pose concern. While the formula is not considered strongly abortifacient, it should only be used during pregnancy under close supervision by a qualified practitioner, and only when the clinical need clearly outweighs the risk. The wine component (Bai Jiu) should be omitted or minimized in pregnant patients.

Breastfeeding

No specific classical prohibitions exist for use during breastfeeding. However, Ban Xia (Pinellia) is a potent herb whose alkaloid components could theoretically transfer into breast milk, and its strong drying and phlegm-resolving properties may affect lactation quality. The wine component should be omitted or greatly reduced for breastfeeding mothers. Use only under professional guidance and monitor the infant for any signs of digestive disturbance.

Children

This formula is rarely indicated in children, as chest obstruction (xiong bi) is predominantly an adult and elderly condition linked to cardiovascular disease. If a pediatric case genuinely matches the pattern (extremely rare), dosages should be reduced to approximately one-quarter to one-third of the adult dose for children under 6, and one-half for children aged 6-12, adjusted by body weight and constitution. The wine component should be omitted entirely for children. A qualified pediatric TCM practitioner should supervise any such use.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Gua Lou Xie Bai Ban Xia Tang

Anticoagulant and antiplatelet medications: Both Gua Lou (Trichosanthes) and Xie Bai (Allium macrostemon) have demonstrated effects on blood rheology, including reducing blood viscosity and inhibiting platelet aggregation. Patients taking warfarin, heparin, aspirin, clopidogrel, or other anticoagulants/antiplatelets should be monitored for increased bleeding risk when using this formula concurrently.

Antihypertensive medications: The formula's vasodilatory and Yang-promoting effects may potentiate or interfere with blood pressure-lowering drugs. Blood pressure should be monitored, especially in patients on calcium channel blockers or nitrates (such as isosorbide mononitrate), as the formula has been studied alongside these agents.

Antidiabetic medications: Some studies suggest Trichosanthes components may have mild hypoglycemic effects. Patients on insulin or oral hypoglycemic agents should monitor blood glucose levels.

Aconitum-containing preparations: Classical herb incompatibility rules (十八反) state that Ban Xia is incompatible with Wu Tou (Aconitum). Concurrent use of any Aconitum-based formula or preparation is contraindicated.

Usage Guidance

Practical advice for getting the most out of Gua Lou Xie Bai Ban Xia Tang

Best time to take

30 minutes after meals, twice daily (morning and evening), taken warm.

Typical duration

Acute/subacute use: typically 1-4 weeks, with reassessment by a practitioner as symptoms change.

Dietary advice

While taking this formula, avoid cold and raw foods (ice, cold salads, raw seafood), greasy and fried foods, and dairy products, as these promote Phlegm production and Cold accumulation — exactly the pathological factors the formula is working to resolve. Avoid excessive alcohol beyond what the formula itself contains. Favor warm, lightly cooked foods that are easy to digest: clear soups, cooked vegetables, congee, and small amounts of mild allium-family vegetables (spring onions, chives) which share warming and Yang-promoting qualities with Xie Bai. Avoid overeating, as a burdened Stomach and Spleen will generate more Phlegm.

Gua Lou Xie Bai Ban Xia Tang originates from Jin Gui Yao Lue (Essential Prescriptions from the Golden Cabinet) by Zhang Zhongjing, Chapter 9: Xiong Bi Xin Tong Duan Qi Bing Mai Zheng Bing Zhi (Chest Obstruction, Heart Pain, and Shortness of Breath) Eastern Hàn dynasty, circa 200 CE

Classical Texts

Key passages from the classical Chinese medical texts that first described Gua Lou Xie Bai Ban Xia Tang and its clinical use

Original indication from the Jin Gui Yao Lue (《金匮要略》), Chapter 9, Clause 4:

「胸痹不得卧,心痛彻背者,栝蒌薤白半夏汤主之。」

"For chest obstruction (xiong bi) where the patient cannot lie down, and heart pain penetrates through to the back, Gua Lou Xie Bai Ban Xia Tang governs."


Commentary from You Yi (尤怡), Jin Gui Yao Lue Xin Dian (《金匮要略心典》):

「胸痹不得卧,是肺气上而不下也;心痛彻背,是心气塞而不和也,其痹为尤甚矣。所以然者,有痰饮以为之援也。故于胸痹药中加半夏以逐痰饮。」

"Chest obstruction with inability to lie down means Lung Qi rises but cannot descend; heart pain penetrating the back means Heart Qi is blocked and cannot harmonize — the obstruction is especially severe. The reason is that phlegm-fluid acts as its ally. Therefore, Ban Xia is added to the chest obstruction formula to expel phlegm-fluid."


Commentary from Wang Ang (汪昂), Gu Fang Xuan Zhu (《古方选注》):

「君以薤白,滑利通阳;臣以栝楼实,润下通阻;佐以白酒熟谷之气,上行药性,助其通经活络而痹自开。」

"The sovereign is Xie Bai, smooth and lubricating, unblocking Yang. The minister is Gua Lou, moistening downward to clear obstruction. The assistant is rice wine, whose ripened-grain Qi carries the medicine upward, helping to open the channels and collaterals so that the obstruction resolves itself."

Historical Context

How Gua Lou Xie Bai Ban Xia Tang evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

Gua Lou Xie Bai Ban Xia Tang originates from Zhang Zhongjing's Jin Gui Yao Lue (《金匮要略》, Essential Prescriptions from the Golden Cabinet), composed around 200 CE during the Eastern Han Dynasty. It appears in Chapter 9, which is dedicated to chest obstruction (xiong bi), heart pain, and shortness of breath. The formula is the second in a graduated series of three prescriptions Zhang Zhongjing designed for chest obstruction of increasing severity: Gua Lou Xie Bai Bai Jiu Tang for mild cases, Gua Lou Xie Bai Ban Xia Tang when Phlegm is copious and obstruction more severe, and Zhi Shi Xie Bai Gui Zhi Tang when the condition progresses further with Qi rebellion rising from below the diaphragm.

The formula has had several alternative names across history, including Gua Lou Xie Bai Tang (as recorded in Yi Chun Sheng Yi) and Gua Lou Ban Xia Bai Jiu Tang (as in Yi Xue Jin Zhen). The Qing Dynasty physician Wu Qian noted in the Yi Zong Jin Jian (《医宗金鉴》) that the key distinction of this formula's pattern is that "the pain is so severe that Qi counterflows upward" — hence the need for Ban Xia to redirect it downward. In the modern era, this formula has become one of the most commonly studied classical prescriptions for cardiovascular disease. Master physician Yan Zhenghua (颜正华), a nationally recognized TCM authority, considered the Gua Lou-Xie Bai herb pair the foundational combination for treating chest obstruction, with subsequent additions tailored to phlegm severity, cold severity, or Qi stagnation.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Gua Lou Xie Bai Ban Xia Tang

1

Clinical Patterns of Traditional Chinese Medicine for Ischemic Heart Disease Treatment: A Population-Based Cohort Study (2022)

Chen YC, et al. Medicina (Kaunas), 2022, 58(7):879

A large population-based cohort study using Taiwan's National Health Insurance database analyzed TCM prescribing patterns for ischemic heart disease. Gua Lou Xie Bai Ban Xia Tang was identified as one of the frequently prescribed formulas, particularly in three-drug combinations for IHD. The study found it was clinically used for chest obstructive syndrome including coronary heart disease angina, intercostal neuralgia, arrhythmia, and emphysema.

PubMed
2

Effect of Gualou-Xiebai-Banxia Decoction on Left Ventricular Systolic Function in Patients with Coronary Heart Disease — RCT (2016)

Wang YA, Yang L, Ren WQ, et al. Chinese Journal of Integrative Medicine on Cardio-/Cerebrovascular Disease (中国中西医结合心脑血管病杂志)

An RCT of 80 patients with ischemic cardiomyopathy-type coronary heart disease compared the formula (added to aspirin) vs. isosorbide mononitrate (added to aspirin) over 2 months. Using speckle tracking imaging to assess cardiac function, the treatment group showed significantly greater improvement in longitudinal peak strain across all myocardial segments compared to the conventional drug group, suggesting the formula can meaningfully improve left ventricular systolic function.

Link
3

Protective Effect and Mechanism of Pretreatment of Gualou Xiebai Banxia Decoction on Myocardial Ischemia-Reperfusion Injury in Rats (2023, Animal Study)

Practical Journal of Cardiac Cerebral Pneumal and Vascular Disease (实用心脑肺血管病杂志), 2023, 31(12)

This preclinical study in 40 rats found that pretreatment with the formula significantly reduced myocardial infarction area, lowered inflammatory markers (IL-1β, TNF-α), improved oxidative stress markers (SOD, MDA, LDH), and inhibited cardiac cell autophagosome formation in a myocardial ischemia-reperfusion injury model. The protective mechanism was linked to suppression of the TLR4/NF-κB signaling pathway.

4

Banxia Gualou Xiebai Tang and Qishen Yiqi Dropping Pills Combined Therapy for Post-PCI Coronary Heart Disease Patients — Retrospective Study (2024)

PMC Article, published 2024

A retrospective analysis of 100 post-PCI coronary heart disease patients with Qi deficiency, phlegm, and blood stasis syndrome found that adding the formula (with Qishen Yiqi Dropping Pills) to standard secondary prevention yielded a total effective rate of 92% versus 76% in controls. The combination group showed significantly better cardiac function (LVEF, CO), blood lipid profiles, and hemorheological parameters.

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.