Last updated: 22 Jul 2022  |  2019 Views  | 


Bupleuri Radix (柴胡) is the dried root of Bupleurum chinense DC. or B. scorzonerifolium Willd., family Apiaceae (Umbelliferae).

Other name 
Chaihu (Chinese), Chinese Thorowax Root

Macroscopic character
Beichaihu (B. chinense): Cylindrical or elongated conical. Apex remained with stem-bases or short fibrous leaf bases, branched at the lower part. External blackish-brown or light brown, with longitudinal wrinkles, rootlet scars and lenticel-like protrudings. Texture hard and tenacious, uneasily broken, fracture laminated-fibrous, bark light brown, wood yellowish-white. Odor, slightly aromatic; taste, slightly bitter.

Nanchaihu (B. scorzonerifolium): Relatively thin, conical. Apex with numerous hairy fibers from withered leaves, usually not branched or slightly branched at the lower part. External reddish-brown or blackish-brown, with dense and transverse annulations at the rootstock. Texture slightly soft, easily broken, fracture slightly even, non-fibrous. Odor, rancid.


Important cultivation area

Hebei, Dongbei, Henan and Shaanxi provinces.

Processing method

1. Chaihu: Eliminate foreign matters and remain of stems, wash clean, soften thoroughly, cut into sections or thick slices, and dry.

2. Cuchaihu: Mix Chaihu with appropriate amount of vinegar until Chaihu are complete moistened (use 20 kg of vinegar for 100 kg of Chaihu), stir-fry on a gentle fire until dry.

Traditional Chinese Medicine action
Pungent, bitter; slightly cold. Enter liver, gallbladder and lung channels.

1.Chaihu: Disperse and reduce fever, soothe the liver to resolve depression, upraise yang qi.

2.Cuchaihu: Modurate dispersion, more potent in soothe the liver and relieve pain.


Thai Traditional Medicine action

Usage and dosage 
3-10 g, decoction for oral use.

* Contraindication and precaution *
Dayechaihu (B. longiradiatum) is an herb in the same genus of Chaihu, but toxic and can not be used as Chaihu.

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