Author: Zhang Zhong-Jing, 張仲景
Year: c. 220
Source: Essentials from the Golden Cabinet (Jin Gui Yao Lue, 金匱要略)
Category: Formulas that Drain Downward
Pattern: Heat clumping in the Intestines and Fire rising to disturb the Stomach
Key Symptoms: Constipation, vomiting
Secondary Symptoms: Facial flushing, red eyes, irritability, bitter taste in the mouth
Tongue: Red with prickles
Pulse: Excessive, forceful
Abdomen: No pronounced distention or pain
Ingredients
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Da Huang
| 12g | |
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Pinyin: Da Huang
Chinese: 大黄
Pharmaceutical: Radix et Rhizoma Rhei
Taxonomy: Rheum palmatum
English: Chinese Rhubarb Root |
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Tastes: Bitter, cold
Meridians Entered: Large Intestine, Spleen, Stomach, Liver and Heart |
Actions & Indications:
- Drains Heat and purges accumulations
Intestinal Heat Excess, with high fever, profuse sweating, thirst, constipation, abdominal distention and pain, delirium, a yellow tongue coat and a full pulse
Yang-Ming Fu Stage
Qi Level Heat in the Intestines
- Drains Fire
Fire from Excess with intense fever, sore throat, and painful eyes and constipation
Fire toxin sores due to Xue Level Heat, especially with constipation
- Clears Heat, transforms Dampness and promotes urination
Damp-Heat with oedema, jaundice, painful urinary dysfunction and acute, hot dysenteric disorders
- Drains Heat from the Blood
Bloody stool either from hemorrhoids or Heat in the Intestines
Chaotic movement of hot Blood with hemoptysis or epistaxis with constipation
It can be powdered and administered orally for bleeding in the upper digestive tract
- Invigorates the Blood and dispels Blood Stasis
Blood Stasis with amenorrhea, fixed abdominal masses or fixed pain
Blood Stasis due to traumatic injury
Intestinal abscess
- Clears Heat and reduces Fire toxicity
Topically or internally for burns or skin lesions (Chuang Yung) due to Heat
- Clears Heat and eliminates Phlegm
Chronic Accumulation of Phlegm-Heat with cough, dyspnea, mania, disorientation and other symptoms of Phlegm Misting the Heart
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Standard Dosage: 10-15g in decoction. Excessive decoction will reduce the purgative action. Therefore it should be added at end to achieve this purpose and over-decocted to eliminate this action.
Cautions: It should be used with caution in case of spleen and stomach deficiency for its bitter and cold property which is easily to damage stomach qi. It is contraindicated to women during pregnancy, menstruation or lactation for it has actions of activating blood and resolving stasis, and can make the purged substances follow lactating out. |
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Gan Cao
| 6g | | |
Pinyin: Gan Cao
Chinese: 甘草
Pharmaceutical: Radix Glycyrrhizae
Taxonomy: Glycyrrhiza uralensis seu glabra seu inflata
English: Liquorice Root |
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Tastes: Sweet, slightly cold
Meridians Entered: Heart, Lung and Spleen (and all 12 meridians) |
Actions & Indications:
- Tonifies the Spleen and augments Qi
Spleen Qi Deficiency with shortness of breath, lassitude and loose stools
Qi and Blood Deficiency with an irregular pulse and/or palpitations
Heart Qi Deficiency or Heart Yang Deficiency
- Moistens the Lungs, resolves Phlegm and stops coughing
Lung Heat or Cold
Productive or non-productive coughing
- Moderates spasms and alleviates pain
Painful muscle spasms of the abdomen and legs
- Clears Heat and relieves Fire Toxicity
Raw for Toxic Heat with sore throat or carbuncles and sores (Chuang Yung)
- Antidote for many toxic substances (internal and topical)
Poisoning
Bites (after washing the wound, chew Gan Cao and apply a thick layer on the bite wound, changing whenever it dries out; Bao Xiang-Ao, 1846, New Compilation of Proven Formulas)
- Moderates and harmonizes the harsh properties of other herbs and guides the herbs to all twelve channels
Often added in small doses to harmonise formulas
- Tonifies the Qi while suppressing Parasites
Gu Sydnrome (Fruehauf, 1998)
Chronic inflammatory disease (Fruehauf, 2015)
- Aids fasting
Mentioned in the Shen Nong Ben Cao Jing as part of the superior class of herbs which can, with protracted taking, make the body light and prolong life. This may suggest it was part of supplementing the diet when engaging in an "avoiding grain" (Bigu 辟穀) fasting regime to cultivate life (Yangsheng 養生).
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Standard Dosage: Typically 1.5-9g in decoction. Large doses can be up 30g.
Cautions: It is contraindicated for combining with Hai Zao, Da Ji, Gan Sui and Yuan Hua because of "eighteen antagonisms". It is also contraindicated in cases of dampness obstruction in middle energizer and edema because it can help dampness obstruct qi, and it is prohibited from long-term usage in large dosage (more than 20g/day) and should be avoided or used with extreme caution in patients with high blood pressure because it may raise aldosterone levels in the blood causing retention of sodium.
The NHS recommends avoiding during pregnancy. |
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Preparation: Decoction.
Actions: Unblocks the bowels, purges clumped Heat, harmonises the Stomach, stops vomiting
Contraindications: Pronounced abdominal distention and pain, or delirious speech for which an 'Order the Qi' formula is indicated
Notes:
Gan Cao causes the anthroquinones in Da Huang, that are responsible for its laxative actions, to form insoluble precipitates, and reduces their uptake by the gut, especially of rhein (Peng et al., 2018; Jiang et al., 2020). This reduces the purgative aspect of the formula and so suggests a milder form of constipation than is indicated for a Cheng Qi Tang formula or Da Chai Hu Tang, and suggested by the absence of pronounced distention or pain in the abdomen.
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One liang is taken as 3g in modern sources but in Eastern Han times it was equivalent to 13.875g. This means that the dosages in classical formulae could have been more than 4x what is given today making them far higher than recommended safe dosages today but prompts consideration of what an effective dose may be (He, 2013).
Research Links:
Reference Notes: (click to display)
Most formulas are found in Scheid, Bensky, Ellis & Barolet (2009): Chinese Herbal Medicine: Formulas & Strategies and Chen & Chen (2015) Chinese Herbal Formulas and Applications. Others are from translations of primary sources. It is recommended that the original material is cross-referenced for mistakes and additional information.
Substitutions have been taken from Ken Lloyd & Prof. Leung (2004): Mayway UK Substitution List or the above publications and are intended as suggestions to help navigate the tight restrictions in the UK quickly. More applicable substitutions may be appropriate in specific situations.
Individual herb information has initially been sourced from TCM Wiki and American Dragon for basic data and then updated manually with my own notes.
These pages are intended to assist clinicians and are not intended for self-diagnosis or treatment for which a qualified professional should be consulted.
