Herb Formulas Notebook

Zi Xue Dan

Purple Snow Special Pill


Author: Wang Tao, 王燾

Year: 752

Source: Arcane Essentials from the Imperial Library (Wai Tai Mi Yao, 外台秘要)


Category: Formulas that Open the Sensory Orifices

Pattern: Blazing Heat sinking into the Pericardium and generating Internal Liver Wind

Key Symptoms: High fever, irritability and restlessness, delirious speech, impaired consciousness, muscle twitches, spasms, convulsions, thirst, parched lips, dark urine and constipation.
Secondary Symptoms: Also febrile convulsions in children.

Tongue: Scarlet red body with dry yellow coat
Pulse: Forceful, wiry and rapid


Ingredients

Shi Gao 1500g
Han Shui Shi 1500g
Hua Shi 1500g
Shui Niu Jiao 500g
Ling Yang Jiao 150g
She Xiang 37.5g
Ci Shi 1500g
Xuan Shen 500g
Sheng Ma 250-300g
Zhi Gan Cao 240g
Mu Xiang 150g
Chen Xiang 150g
Ding Xiang 30g
Zhu Sha 90g
Mang Xiao 5000g
Xiao Shi 96g (Nitrum)
Huang Jin 3000g (Gold)

Subsitutions:
Practically this entire formula has to be substituted in the UK making it unsuitable for use. If it were to be attempted some substitutions to consider could be:

Shi Gao == Zhi Mu
Han Shui Shi == Zhi Mu + Ze Xie
Hua Shi == Chi Fu Ling + Ze Xie
Shui Niu Jiao == Xuan Shen + Huang Lian in 3:1 ratio
Ling Yang Jiao == Gou Teng + Mu Dan Pi
She Xiang == Shi Chang Pu + Ru Xiang
Ci Shi + Gong Lao Ye + Hu Po
Chen Xiang == Hou Po + Jiang Xiang (not prohibited but usually substituted due to expense)
Zhu Sha == Hu Po
Mang Xiao == Yu Li Ren

In China this formula is still produced but with Zhu Sha removed due to its toxicity and Huang Jin removed due to its expense. The original source text also calls for 150g Xi Jiao which has been substituted for 500g of Shui Niu Jiao due to its endangered status, and also calls for Qing Mu Xiang which is a toxic aristolochia species and is widely thought to mean Mu Xiang or Chuan Mu Xiang.


Preparation: The mineral ingredients were crushed into pieces and boiled in water three times. The herbal ingredients were then boiled three times with the minerals to form a syrup. The powdered Mang Xiao and Xiao Shi were mixed with this syrup which was then dried and powdered. Zhu Sha was processed in water to remove impurities and then powdered, She Xiang was powdered and all of these powders were combined together to make the final formula.


Actions: Clears Heat, opens the sensory orifices, controls spasms and convulsions and extinguishes Wind



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.