Chinese medicinal herbs for eliminating heat and dampness - Huanglian Rhizoma Coptidis

Chinese medicinal herbs for eliminating heat and dampness - Huanglian Rhizoma Coptidis

The source is from Rhizome of Coptis chinensis Franch, and C. deltoidea C. Y. Cheng et Hsiao or Coptis teetoides C.Y. Cheng, family Ranunculaceae. The producing areas are mainly in the provinces of Sichuan and Yunnan. The medicinal material is dug and collected in autumn and dried. The crude or stir-baked one can be used. Medicinal Properties Bitter in flavor, cold in nature and attributive to the heart, liver, stomach and large intestine meridians.
Actions: Clear away heat and remove dampness purge the sthenic fire and eliminate toxic materials.

Application
1. It is used for dysentery and vomiting of dampness-heat type. It has a strong action of clearing away heat and eliminating dampness and is especially good at removing heat and dampness from the middle energizer, and serves as an essential medicinal herb for treatment of diarrhea and dysentery of damp-heat type. In the case accompanied with abdominal pain due to qi stagnation, it can be combined with Muxiang (Radix Aucklandiae) that can circulate qi and arrest pain, such as Xianglian Wan (Pill); in the case with general fever, combined with Gegen (Radix Puerariae ) and Huangqin ( Radix Scutellariae ), such as Gegen Qm Llan Tang (Decoction); for dysentery with pus and blood, combined with Danggui (Radix Angelicae Sinensis ), Rougui ( Cortex Cinnamomi ), Baishaoyao ( Radix Paeoniae Alba ), etc., such as Shaoyao Tang (Decoction); for damp-heat stagnation in the middle energizer and disorder of qi activity with full-ness in the epigastric abdomen with nausea and vomiting, usually used together with Huangqin (Radix Scutellariae ) , Ganjiang ( Rhizoma Zingiberis ) , and Banxia ( Rhizoma Pinelliae), etc., such as Banxia Xiexin Tang (Decoction).

2. It is used for high fever and restlessness due to excessive heat and fire. It is good at clearing away sthenicheat of heart meridian. It can be used for febrile disease with excessive fire and heat marked by high fever and restlessness and is usually combined with Zhizi (Fructus Gardeniae) and Huangqin (Radix Scutellariae), such as Huanglian Jiedu Tang (Decoction) ; for sthenic heart-fire and insufficiency of yin and blood manifested as dysphoria and insomnia, it can be used together with Ejiao ( Colla Corii Asini ) and Baishaoyao ( Radix Paeoniae Alba ), such as Huanglian Ejiao Tang (Decoction); for excessive heart-fire flaming up with aphthae, it can be used alone or together with the same dosage of Xixin ( Herba Asari ), which are ground into powder for use in mouth; for hemopyretic bleeding due to excessive heart-fire with hemafecia or epistaxis, used together with Dahuang (Radix et Rhizoma Rhei) and Huangqin (Radix Scutellariae ), such as Xiexin Tang (Decoction).

3. It is used for toothache due to stomach-fire and vomiting due to stomach-heat. For the former, it is used together with Shengdihuang (Radix Rehmanniae ), Shengma ( Rhizoma Cimicifugae ), and Baizhi ( Radix Angelicae Dahuricae), etc. so as to clear away stomach-fire and expel stagnated fire, such as Qingwei San (Powder); for the latter with uncomfortable feelings in the epigastric region, combined with Banxia ( Rhizoma Pinelliae ), Zhuru (Caulis Bambusae in Taeniam ) and others that can relieve vomiting, so it is a common medicinal herb for treatment of vomiting due to stomach heat; it can be also used together with Wuzhuyu (Fructus Evodiae), such as Zuojin Wan (Pill) to treat vomiting with acid regurgitation due to liver-fire attacking the stomach, and combined with Tianhuafen ( Radix Trichosanthis ), Dihuang ( Radix Rehmanniae) and others that can clear away heat and promote the production of the body fluids to treat syndrome of excessive stomach-fire with polyorexia and diabetes manifested as excessive thirst and frequent drinking.

4. It is used for carbuncle and swelling and sore of dampness type due to heat-toxin and especially good at treatment of furunculosis since it can clear away heat and eliminate dampness, and purge fire for removing toxin. Orally it can be combined with Huangqin (Radix Scutellariae ), Dahuang (Radix et Rhizoma Rhei ), and Lianqiao (Fructus Forsythiae) and others that can clear away heat and eliminate toxic materials and also combined with other herbs for external use.

Usage and Dosage 2 -5 g is used in decoction for oral use and 0.5 -1 g of the powder is swallowed and just right amount for external use. The one stir-baked with wine can clear away fire from the upper energizer and the one stir-baked with ginger juice and Wuzhuyu (Fructus Evodiae) can moderate the bitter and cold property so as to strengthen the action of relieving vomiting and with pork bile can purge sthenic-fire of the liver and gallbladder.

Notes: Being extremely bitter and cold, it is easy to injure yang-qi of the spleen and stomach and contraindicated for deficiency and cold of the spleen and stomach and with caution for consumption of yin due to its bitter and dry property and of body fluids due to yin deficiency.

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