Herb Formulas Notebook

Gui Zhi Tang

Cinnamon Twig Decoction


Author: Zhang Zhong-Jing, 張仲景

Year: c. 220

Source: Discussion of Cold Damage (Shang Han Lun, 傷寒論)


Category: Formulas that Release the Exterior

Pattern: Taiyang stage Wind-strike Cold Damage with Exterior deficiency; Taiyin Cold Damage with Exterior signs; imbalance of Ying and Wei Qi; disharmony of Yang Wei Mai with spontaneous sweating

Key Symptoms: Pain and stiffness in the head and nape of the neck, aversion to cold and drafts (including intolerance of open windows and needing to wear a scarf or protective clothing), sweating at any time of day or night (may be spontaneous or triggered by activity, stress or wind), fever or other heat symptoms
Secondary Symptoms: Nasal obstruction, aching and pain in the extremities (especially arms and shoulders), dry heaves, flushing, constipation, fullness in the abdomen with vomiting, poor appetite, progressive and spontaneous diarrhoea, abdominal pain

Tongue: May have white coating but not always
Pulse: Floating and either lax or frail
Abdomen: Tension in rectus abdominis


Ingredients

Gui Zhi 9g
Bai Shao 9g
Zhi Gan Cao 6g
Sheng Jiang 4sl
Da Zao 3-4pc


Preparation: Decoction.


Actions: Releases pathogens from the muscle layer, regulates Ying and Wei

Contraindications: Exterior Cold and interior Heat, or internal Dampness



Notes:
This is one of the principle formulae of the Shang Han Lun and therefore of Chinese medicine as a whole.

Extraordinary Vessel attributions come from Li Shi-Zhen's (1577-8) Exposition on the Eight Extraordinary Vessels (Qi Jing Ba Mai Kao), trans. Chace & Shima (2009).

---------------------------------------

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).

---------------------------------------

Liu Lihong (2019: 276-7, Classical Chinese Medicine) contemplates why there are formulas named after the mythical animals of each of the four directions except the Scarlet Bird of the South. He considers that this may be regarding a taboo regarding the use of references to the emperor who was associated with the sun and the south and that the Taiyang formulas may have meant to represent the Scarlet Bird of the South.



Research Links:



Reference Notes: (click to display)

These pages are intended to assist clinicians and are not intended for self-diagnosis or treatment for which a qualified professional should be consulted.