Dang Gui Bu Xue Tang

Tangkuei Decoction to Tonify the Blood · 當歸補血湯

Also known as: Huang Qi Dang Gui Tang (黄芪当归汤), Bu Xue Tang (补血汤), Qi Gui Tang (芪归汤),

A deceptively simple two-herb formula designed to rebuild blood by first strengthening the body's Qi. It is especially useful for fatigue, pallor, and a type of feverish feeling that comes from severe blood and Qi depletion, such as after heavy blood loss, childbirth, or prolonged exhaustion. Despite being named a 'blood-tonifying' formula, its strategy is to powerfully boost Qi so the body can generate new blood on its own.

Origin Nei Wai Shang Bian Huo Lun (内外伤辨惑论, Clarifying Doubts About Injury from Internal and External Causes) by Li Dongyuan (李东垣) — Jīn dynasty (金朝), 1247 CE
Composition 2 herbs
Huang Qi
King
Huang Qi
Dang Gui
Deputy
Dang Gui
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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. Dang Gui Bu Xue Tang is designed to correct these specific patterns.

Why Dang Gui Bu Xue Tang addresses this pattern

When prolonged overwork, hunger, or excessive blood loss depletes the Blood, the Qi that is inseparable from Blood also becomes exhausted. Without adequate Blood to anchor the body's Yang Qi, it 'floats' outward, producing a paradoxical fever with flushed face and a surging pulse that can be mistaken for an excess-heat condition. The critical difference is that this pulse is large but forceless on firm pressure, revealing its deficient nature. Huang Qi powerfully restores the Qi of the Spleen and Lungs, the organs responsible for generating Blood from food essence, while simultaneously anchoring the floating Yang. Dang Gui directly nourishes the depleted Blood. Together they restore the Qi-Blood relationship: as Qi becomes sufficient, it drives the production of new Blood, and as Blood refills, it anchors the Yang, resolving the false heat.

A practitioner would look for one or more of these signs

Fever

Low-grade or fluctuating fever from blood deficiency, not infection

Facial Flushing

Red face that appears hot but stems from deficiency, not excess heat

Thirst

Irritable thirst with desire for warm drinks

Eye Fatigue

Profound exhaustion from overwork or blood loss

Dull Pale Complexion

Underlying pallor beneath the flushing

Dizziness

Lightheadedness from insufficient blood reaching the head

Commonly Prescribed For

These conditions can arise from the patterns above. A practitioner would consider Dang Gui Bu Xue Tang when these conditions are specifically caused by those patterns — not for all cases of these conditions.

Arises from: Qi Deficiency

TCM Interpretation

In TCM, anemia corresponds most closely to Blood deficiency (血虚), but a critical insight is that Blood deficiency rarely exists in isolation. The Spleen is the primary organ responsible for transforming food into Blood. When the Spleen's Qi is weak, it cannot adequately perform this transformation, leading to insufficient Blood production. This is why many anemia patients also present with fatigue, poor appetite, and digestive weakness alongside the expected pallor, dizziness, and palpitations. The root problem is often Qi deficiency leading to Blood deficiency, not Blood deficiency alone.

Why Dang Gui Bu Xue Tang Helps

Dang Gui Bu Xue Tang addresses anemia at its root by using a large dose of Huang Qi to restore the Spleen's Qi and its ability to generate Blood from food, while Dang Gui directly nourishes the existing blood supply. This dual approach of tonifying Qi to generate Blood is more effective than using Blood tonics alone, because it rebuilds the body's own blood-producing capacity. Clinical studies have shown the formula can improve red blood cell counts and hemoglobin levels, particularly when used as an adjunct to standard treatment for renal anemia.

Also commonly used for

Postpartum Fever

Fever after childbirth from blood loss and Qi depletion

Leukopenia

Low white blood cell count, especially post-chemotherapy

Bleeding

Dysfunctional uterine bleeding from Qi failing to hold Blood

Diabetic Neuropathy

As adjunctive therapy with conventional treatment

Chronic Wound Healing

Non-healing ulcers and sores from Qi and Blood deficiency

Purpura

Low platelet-related bleeding with Blood deficiency

What This Formula Does

Every TCM formula has a specific set of actions — here's what Dang Gui Bu Xue Tang does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Dang Gui Bu Xue Tang is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Dang Gui Bu Xue 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 Dang Gui Bu Xue Tang works at the root level.

This formula addresses a pattern where overwork, exhaustion, hunger, or blood loss has severely depleted both Qi and Blood. In TCM theory, Blood is a Yin substance that anchors and contains Yang. When Blood becomes deeply insufficient, it can no longer "hold" Yang in place. The body's Yang then floats upward and outward uncontrollably, producing symptoms that paradoxically resemble intense Heat: a flushed face, red eyes, a sensation of heat in the muscles, and strong thirst.

The critical insight of Li Dongyuan was that this presentation closely mimics a genuine excess-Heat condition (like the Bai Hu Tang pattern seen in high fevers from infectious disease), but the underlying cause is the exact opposite: profound emptiness rather than fullness. The telltale sign is the pulse, which feels surging and large on light touch but collapses completely under firm pressure, revealing the hollowness underneath. The thirst in this pattern also differs: the patient often prefers warm drinks rather than cold, and the thirst comes and goes rather than being constant and intense.

The same mechanism explains the formula's use in postpartum fever and chronic wounds that fail to heal. After childbirth or surgery, significant blood loss depletes both Qi and Blood, leaving the body unable to consolidate its remaining vitality. In wound healing, Qi and Blood are the raw materials for tissue repair; when both are depleted, the body lacks the resources to close and heal the wound.

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 sweet and mildly pungent. The sweet flavor from Huang Qi and Dang Gui tonifies Qi and Blood, while the subtle pungency of Dang Gui gently moves Blood and prevents stagnation.

Channels Entered

Ingredients

2 herbs

The herbs that make up Dang Gui Bu Xue Tang, 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
Huang Qi

Huang Qi

Astragalus root

Dosage 30g
Temperature Slightly Warm
Taste Sweet (甘 gān)
Organ Affinity Spleen, Lungs
Preparation Honey-prepared (蜜炙黄芪) preferred in classical usage

Role in Dang Gui Bu Xue Tang

Powerfully tonifies the Qi of the Spleen and Lungs. As the King herb at five times the dosage of Dang Gui, it anchors the floating Yang back to the interior, secures the exterior to prevent further loss, and provides the vital Qi needed for the body to generate new blood. This reflects the classical principle that 'formless Qi generates form-bearing Blood.'
Deputy — Assists and enhances the King
Dang Gui

Dang Gui

Chinese Angelica root

Dosage 6g
Temperature Warm
Taste Sweet (甘 gān), Acrid / Pungent (辛 xīn)
Organ Affinity Liver, Heart, Spleen
Preparation Wine-washed (酒洗) in classical usage

Role in Dang Gui Bu Xue Tang

Nourishes and harmonizes the Blood, invigorates blood circulation. Working with Huang Qi's Qi-tonifying action, Dang Gui directly replenishes the blood supply from below while Huang Qi generates blood from above. Together, the Yang (Qi) ascends and the Yin (Blood) grows, achieving the formula's core mechanism of tonifying Qi to generate Blood.

Why This Combination Works

How the herbs in Dang Gui Bu Xue Tang complement each other

Overall strategy

The patient's Blood is severely depleted, and without Blood to anchor the Yang, it floats outward, producing a paradoxical fever that mimics an excess-heat condition. The formula's genius is to address this emergency by heavily tonifying Qi rather than directly replenishing Blood, based on the principle that 'tangible Blood cannot be quickly generated, while intangible Qi must be urgently secured.'

King herb

Huang Qi (30g) serves as the sole King herb at five times the dosage of Dang Gui. It powerfully tonifies the Qi of the Spleen and Lungs, which are the source of Blood production through their role in transforming food into vital substances. By strongly supplementing Qi, it both generates new Blood and secures the floating Yang back to the interior, resolving the false heat. Its action of consolidating the exterior also prevents further loss of the body's resources.

Deputy herb

Dang Gui (6g) acts as Deputy, directly nourishing and harmonizing the Blood. Though used in a smaller dose, it is indispensable: it provides the 'seed' of Blood nourishment that Huang Qi's Qi then amplifies. It also gently invigorates circulation so that newly generated Blood flows smoothly rather than stagnating. The combination embodies the principle that 'Yang generates and Yin grows' (阳生阴长): as Qi becomes abundant, Blood naturally follows.

Notable synergies

The Huang Qi and Dang Gui pairing at a 5:1 ratio is one of the most celebrated herb pairs (dui yao) in Chinese medicine. Individually, Huang Qi is a Qi tonic and Dang Gui is a Blood tonic, but together they create a synergy where Qi generation powers Blood production far more effectively than Blood tonics alone could achieve. The 5:1 ratio specifically emphasizes Qi supplementation for acute Blood depletion with floating Yang. When the goal shifts to nourishing Blood without the floating Yang component, the ratio can be adjusted.

How to Prepare

Traditional preparation instructions for Dang Gui Bu Xue Tang

Coarsely grind the herbs and combine as a single dose. Add approximately 600 mL (two bowls) of water and decoct until approximately 300 mL (one bowl) remains. Strain and remove the dregs. Take warm on an empty stomach, before meals.

The classical text specifies preparing the entire formula as a single serving (都作一服). In modern clinical practice, the standard decoction method is to soak the herbs for 30 minutes, bring to a boil over high heat, then simmer over low heat for approximately 30 to 60 minutes before straining.

Common Modifications

How practitioners adapt Dang Gui Bu Xue Tang for specific situations

Added
Ren Shen

6-9g, powerfully tonifies source Qi

Bai Zhu

9g, strengthens the Spleen to support Qi production

When Qi deficiency is the dominant presentation, adding Ren Shen and Bai Zhu reinforces the Spleen's Qi-generating capacity beyond what Huang Qi alone can achieve.

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

Contraindications

Situations where Dang Gui Bu Xue Tang should not be used or requires extra caution

Avoid

Yin deficiency with Heat (fever from true Yin depletion with night sweats, five-palm heat, red tongue with little coating). This formula's warm, Qi-tonifying nature would worsen Yin-deficient Heat.

Avoid

Excess Heat patterns or febrile disease caused by external pathogenic factors. The original text warns that mistaking this pattern for a Bai Hu Tang (White Tiger Decoction) presentation is dangerous, and the reverse is equally true: using this warm tonifying formula for genuine excess Heat can be fatal.

Avoid

Active bleeding that is due to Blood Heat (bright red blood, rapid pulse, red tongue). Huang Qi's upward-lifting nature could worsen Heat-driven hemorrhage. Only Blood-deficiency type bleeding with pale blood is appropriate.

Caution

Concurrent use of anticoagulant or antiplatelet medications (warfarin, heparin, clopidogrel). Dang Gui contains coumarin-like compounds and ferulic acid that may potentiate anticoagulant effects and increase bleeding risk.

Caution

Patients with hormone-sensitive cancers (certain breast, ovarian, or prostate cancers). Research has shown that the formula has estrogen-like activities, and while these differ from direct estrogenic effects, caution is warranted.

Caution

Spleen and Stomach Dampness with bloating, loose stools, and a thick greasy tongue coating. The sweet, tonifying nature of Huang Qi and Dang Gui can exacerbate Dampness if the middle burner is already congested.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Generally considered safe and has traditionally been used during and after pregnancy for blood-deficiency conditions, including postpartum fever and blood loss. Neither Huang Qi nor Dang Gui are classically listed as pregnancy-prohibited herbs. However, Dang Gui has mild blood-moving properties and some sources note potential estrogenic-like activity from the formula's phytochemical profile. As a precaution, use during pregnancy should be guided by a qualified practitioner who can confirm the pattern fits. Memorial Sloan Kettering Cancer Center advises avoiding the formula during pregnancy out of general caution due to insufficient safety data.

Breastfeeding

No specific adverse effects during breastfeeding have been reported in the classical literature or modern studies. Traditionally, the formula has been used postpartum to help recover from blood loss and support milk production through Qi and Blood tonification. Both Huang Qi and Dang Gui are commonly found in postpartum recovery formulas. However, formal pharmacokinetic studies on transfer of active compounds through breast milk are lacking. Nursing mothers should use this formula under practitioner guidance. Memorial Sloan Kettering Cancer Center advises general caution during breastfeeding due to limited safety data.

Children

Classical sources document the use of Dang Gui Bu Xue Tang variants in pediatric practice, particularly for children with weak constitutions, skin eruptions (e.g. measles or pox) that fail to surface properly, and allergic purpura of the deficiency-cold type. Dosages should be reduced to approximately one-third to one-half of the adult dose for children aged 6-12, and one-quarter for children under 6, adjusted by the practitioner based on body weight and constitution. The formula is mild in composition (only two herbs, both food-grade) and generally well tolerated in children. It should not be used in pediatric fevers caused by external infection or excess Heat.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Dang Gui Bu Xue Tang

Anticoagulants and antiplatelet agents (warfarin, heparin, clopidogrel, aspirin): Dang Gui (Angelica sinensis) in this formula contains coumarin-like compounds and ferulic acid, which have demonstrated antiplatelet and mild anticoagulant properties. Animal studies have shown that Dang Gui can alter the pharmacodynamics of warfarin, potentially increasing prothrombin time and bleeding risk during chronic co-administration. A published case report documented potentiation of warfarin by Dong Quai. Patients on anticoagulant therapy should inform their prescribing physician before taking this formula, and INR monitoring is advised.

Hypoglycemic agents (metformin, insulin, sulfonylureas): Both Huang Qi and Dang Gui have demonstrated blood-glucose-lowering effects in pharmacological studies. Concurrent use with diabetes medications may theoretically potentiate hypoglycemic effects. Blood glucose should be monitored more closely.

Immunosuppressants: Research has shown that this formula stimulates immune responses, including enhancing natural killer cell activity and promoting lymphocyte proliferation. This could theoretically counteract immunosuppressive drugs used in organ transplant patients or autoimmune conditions.

Usage Guidance

Practical advice for getting the most out of Dang Gui Bu Xue Tang

Best time to take

On an empty stomach before meals (空心食前), as specified in the original text. Typically taken warm, once or twice daily.

Typical duration

Acute blood-deficiency fever: 3-7 days. Chronic Qi and Blood deficiency (anemia, postpartum recovery, chronic wounds): 2-8 weeks, reassessed regularly by a practitioner.

Dietary advice

During the course of treatment, favor warm, easily digestible, Blood-nourishing foods such as congee, bone broth, dates (da zao), goji berries, dark leafy greens, and well-cooked root vegetables. Moderate amounts of red meat, liver, or black chicken can support blood production. Avoid cold and raw foods (salads, iced drinks, raw fruit in excess) as these can impair the Spleen's ability to generate Qi and Blood, counteracting the formula's purpose. Avoid greasy, heavy, or overly rich foods that can generate Dampness and obstruct the middle burner. Limit spicy-hot foods and alcohol, which can aggravate the floating Yang and worsen the sensation of heat.

Dang Gui Bu Xue Tang originates from Nei Wai Shang Bian Huo Lun (内外伤辨惑论, Clarifying Doubts About Injury from Internal and External Causes) by Li Dongyuan (李东垣) Jīn dynasty (金朝), 1247 CE

Classical Texts

Key passages from the classical Chinese medical texts that first described Dang Gui Bu Xue Tang and its clinical use

Li Dongyuan, Nei Wai Shang Bian Huo Lun (《内外伤辨惑论》), Chapter on Summer-Heat Damaging Stomach Qi:

治肌热,燥热,困渴引饮,目赤面红,昼夜不息。其脉洪大而虚,重按全无。《内经》曰脉虚血虚,又云血虚发热,证象白虎,惟脉不长实有辨耳,误服白虎汤必死。此病得之于饥困劳役。

"Treats muscle-level heat, dry heat, distressed thirst with desire to drink, red eyes and flushed face, persisting day and night. The pulse is surging and large yet hollow, and completely absent on firm pressure. The Nei Jing says: 'When the pulse is deficient, the Blood is deficient.' It also says: 'Blood-deficiency fever resembles a White Tiger [pattern].' The only way to distinguish them is that the pulse is not long and firm. Mistakenly administering Bai Hu Tang will certainly cause death. This illness arises from hunger, exhaustion, and overwork."

Wu Kun, Yi Fang Kao (《医方考》), Volume 3:

血实则身凉,血虚则身热……当归味厚,为阴中之阴,故能养血;而黄芪则味甘补气者也。今黄芪多于当归数倍,而曰补血汤者,有形之血不能自生,生于无形之气故也。《内经》曰:阳生阴长,是之谓尔。

"When Blood is replete the body is cool; when Blood is deficient the body is hot... Dang Gui has a thick flavor, being Yin within Yin, and so it nourishes Blood. Huang Qi has a sweet flavor and tonifies Qi. Now, Huang Qi is used at several times the amount of Dang Gui, yet this is called 'Tonify Blood Decoction.' This is because tangible Blood cannot generate itself; it is born from intangible Qi. The Nei Jing says: 'When Yang grows, Yin flourishes.' This is precisely what is meant."

Wang Ang, Yi Fang Ji Jie (《医方集解》):

当归气味俱厚,为阴中之阴,故能滋阴养血;黄芪乃补气之药,何以五倍于当归,而又云补血汤乎?盖有形之血,生于无形之气。又有当归为引,则从之而生血矣。

"Dang Gui is thick in both Qi and flavor, being Yin within Yin, and so nourishes Yin and Blood. Huang Qi is a Qi-tonifying medicinal, so why use five times as much as Dang Gui and still call it a 'Blood-Tonifying Decoction'? Because tangible Blood is born from intangible Qi. With Dang Gui as a guide, it follows and generates Blood."

Historical Context

How Dang Gui Bu Xue Tang evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

Dang Gui Bu Xue Tang was created by Li Dongyuan (Li Gao, 李杲, 1180-1251), one of the four great physicians of the Jin-Yuan period and the founder of the "Spleen-Stomach School" (补土派) of Chinese medicine. The formula first appeared in his Nei Wai Shang Bian Huo Lun (《内外伤辨惑论》, Clarifying Doubts about Damage from Internal and External Causes), published around 1247, within the chapter on Summer-Heat Damaging Stomach Qi (暑伤胃气论).

Li Dongyuan lived through the devastating Mongol siege of Kaifeng and the collapse of the Jin dynasty, a period of enormous suffering. Famine, forced labor, displacement, and emotional distress left the population with widespread internal-damage illnesses. Many physicians of the time mistook these deficiency fevers for excess-Heat conditions and administered harsh purging or cold-clearing treatments, causing widespread iatrogenic deaths. Li's formula was a direct response: a radically simple two-herb prescription that used warm tonification (甘温除大热, "sweet-warm to clear great Heat") to treat what appeared to be raging fever. His famous principle "tangible Blood cannot be quickly generated; intangible Qi must be urgently secured" (有形之血不能速生,无形之气所当急固) became one of the most cited clinical aphorisms in Chinese medicine.

The formula was later also recorded in Li Dongyuan's Lan Shi Mi Cang (《兰室秘藏》). Over the centuries, it was adopted and expanded by physicians across many specialties. In 2018, the formula was included in China's national Catalogue of Ancient Classical Prescriptions (First Batch), confirming its enduring clinical significance. It has been documented across 186 classical medical texts spanning the Jin-Yuan, Ming, and Qing dynasties.

Modern Research

5 published studies investigating the pharmacological effects or clinical outcomes of Dang Gui Bu Xue Tang

1

Phase II Randomized Double-Blind Dose-Escalation Clinical Trial for Menopausal Symptoms (2013)

Wang CC, Cheng KF, Lo WM, et al. Menopause. 2013;20(2):223-231.

A randomized, double-blind trial in 60 postmenopausal women tested three doses of Dang Gui Bu Xue Tang (1.5, 3.0, and 6.0 g/day) over 12 weeks. The highest dose group showed the greatest improvements in psychological and somatic symptom domains on both the Greene Climacteric Scale and Menopause-Specific Quality of Life questionnaire, with statistically significant between-group differences.

2

Third Clinical Trial for Menopausal Symptom Relief and Estrogen Safety Assessment (2022)

Wong ELY, Cheung AWL, Haines CJ, et al. Journal of Menopausal Medicine. 2022;28(1):33-39.

A follow-up clinical trial of high-dose DBT over 12 weeks confirmed overall improvement in all four quality-of-life domains for menopausal women. Importantly, monitoring of serum inflammatory cytokines (IL-6, IL-8, TNF-alpha) showed no evidence of direct estrogenic bioactivity, supporting the formula's safety profile distinct from hormone replacement therapy.

3

Systematic Review and Meta-Analysis for Renal Anemia (2017)

Zhao MM, Zhang Y, Li LS, Yu ZK, Li B. Annals of Translational Medicine. 2017;5(6):136.

This systematic review evaluated Dang Gui Bu Xue Tang as adjunctive therapy for renal anemia alongside standard Western treatment. The analysis found that combining the formula with conventional therapy significantly improved hemoglobin levels and clinical outcomes compared to Western medicine alone.

4

Cardioprotective Effect and Glutathione Enhancement in Rat Hearts (2006)

Mak DH, Chiu PY, Dong TT, et al. Phytomedicine. 2006;13(7):524-531.

Using an ex vivo rat heart model, researchers found that pre-treatment with DBT protected against myocardial ischemia-reperfusion injury in a dose-dependent manner. The combined decoction was more potent than the individual herb extracts mixed together, supporting the classical 5:1 ratio. DBT also enhanced glutathione status in heart mitochondria and red blood cells, increasing resistance to oxidative stress.

PubMed
5

Preclinical Study: Amelioration of Radiation-Induced Heart Disease via Nrf2/HMGB1 Pathway (2023)

Frontiers in Pharmacology. 2023;13:1086206.

In a mouse model of radiation-induced heart disease, DBT at the classical 5:1 ratio activated the Nrf2 pathway, downregulated cardiac HMGB1 protein, and significantly improved left ventricular function and reduced myocardial fibrosis. The 5:1 ratio outperformed alternative ratios, supporting the traditional formulation.

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.