Individual Herbs Notebook

Chai Hu

Translation: Kindling of the Barbarians

Pharmaceutical: Radix Bupleuri
Taxonomy: Bupleurum chinense (Nan Chai Hu) seu scorzoneraefolium (Bei Chai Hu)

Other names: Hare's Ear Root / Thorowax Root

Category: Herbs that Release the Exterior



Properties: Bitter, pungent, slightly cold

Meridans Entered:
Primary: Liver and Spleen
Divergent Channels: Gallbladder, Liver
Extraordinary Vessels: Dai


Traditional Actions/Indications:
  1. Resolves Shaoyang disorders and reduces fever (harmonizes the Exterior and Interior)
    Shaoyang Stage with alternating chills and fever, a bitter taste,dizziness, tinnitus, flank pain, irritability, vomiting and a stifling sensation in the chest
    Deficiency Heat (auxiliary)
    Gallbladder Fire
    The Shen Nong Ben Cao Jing says "It weeds out the stale to bring forth the new."
  2. Spreads Liver Qi and relieves Stagnation
    Liver Qi Stagnation with dizziness, vertigo, chest and flank pain, emotional instability and menstrual problems
    Disharmony between the Liver and Spleen with epigastric and flank pain, a stifling sensation in the chest, abdominal bloating, nausea and indigestion
    Liver/Gallbladder Disharmony
    The Shen Nong Ben Cao Jing says "It mainly treats bound qi in the heart, abdomen, intestines, and stomach, food stagnation, cold and heat, and evil qi."
  3. Raises Yang Qi (specifically the Clear Qi of the Stomach and Gallbladder)
    Spleen and Stomach Yang Deficiency, Qi collapse (prolapse) with hemorrhoids, vaginal discharge, bleeding or exhaustion
  4. Disperses Wind-Heat and resolves Phlegm and congestion
    Wind-Heat
  5. Guides herbs to the Shaoyang aspects of the head
    Shaoyang headaches
  6. Releases the Exterior and Drives Out Snakes
    Relieves the symptoms of Gu Sydnrome while suppressing parasites (Fruehauf, 1998)
    Chronic inflammatory disease (Fruehauf, 2015)
  7. 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, brighten the eyes and boost the Essence. 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).

Suggested Daily Dosage: Up to 3g to raise sinking Qi, 6-9g to relieve Liver Qi stagnation, 12-24g to release the exterior.


Cautions: Anyone who has syndromes of yin deficiency with yang hyperactivity, stirring of liver wind, yin deficiency with effulgent fire and qi going upward adversely, this herb should be used with cautions.


Notable Constituents: Taken from Yang et al (2017).

Quality Tests:
The saponin content can be estimated by placing in water. Saponins (meaning soap-like) will attract bubbles to the surface. The more bubbles it attracts the higher the content and conversely if it does not it may be poor quality or an substitute species (Open day at Avicenna Clinic Brighton, 2016).


Appears in 88 formulae listed on this site: (click to display)
Research Links & References: (click to display)