Biological name 拉丁學名：Scrophularia mingpeonsis Hemsl.
Common Name 英文名：ningpo figwort root, scrophularia
Other Names 別名：
yuan shen, hei shen, hei xuan shen
元参，黑参，黑玄参。
Distribution 分佈：
Zhejiang, Hubei, Jiangsu, Jiangxi, Sichuan
浙江，湖北，江蘇，江西，四川。
Properties (characteristics) 性味﹕
salty, sweet, bitter, cold
味﹕鹹﹐ 甜﹐苦。性﹕寒
Channels (meridians) entered 歸經﹕
kidney, lung stomach
腎﹐肺﹐胃
Actions & Indications 主治﹕
cooling blood, promote yin, rid of toxin and heat,and soothing the throat.
清熱解毒，滋陰除煩，利咽喉 。
Medical Function 藥理﹕
1. Effect on heart and blood vessels: lower blood pressure due to vasso-dilation, especially in renal hypertension.
2. Anti bacterial effect:
3. Effect on concentration of blood sugar
4. Anti inflammatory effect
5. Sedative effect
6. Anti-pyretic
1. 擴張血管
2. 抗菌
3. 降低血醣
4. 抗炎
5. 解熱
6. 鎮靜
Chemical ingredients 化學成份：
harpagoside, harpagide, aucubin, 6-methylcatapol, ningpogoside A, B, mingpogenin scropoliside A, angoroside, trace amount of evaporing oil, glucose, oleic acid, linoleic acid, stearic acid, carotene and saponins.
Dosage per day 每日用量﹕9 to 30 gSamples of formulae 處方舉例：
1. For infection with high fever, red tongue, & thirst: xuan shen, sheng di huang, mai dong, jin yin hua, lian qiao and huang liang. Boil with water to make tea.
2. For habitual constipation: xuan shen 15 g, dang gui 14 g, tian hua fen 15 g, lai fu zi 30 g. Make into powder. Take 6 g each time, 3 times a day. 10 days is one treatment. Result: among 96 patients, using 1 to 3 treatments, 86 were healed; 7 were effective and 3 were not effective.
3. For cold with sore throat
1. 感染而有高熱，舌紅，口渴：玄参，生地黄， 麥東 ， 金銀花， 連翹，黄連。.水 煎服。
2. 長期便秘：玄参15 g, 當歸 14 g, 天花粉 15 g, 萊菔子30 g。共為末。每次服6 g。每天3次。十日為一療程。 療效：96病例。用1～3療程。86痊愈。7例 有效。3例無效。
3. 感 冒喉痛
Cautions禁忌：
not to use in cases of spleen or stomach dampness without heat (huo) , or diarrhea due to pixu.
Some sources mentioned that xuan shen is incompatible with huang qi, gan jiang, da zao, li lu, ku shen and shan zhu yu.
li lu, ku shen and xuan shen may trigger irregular heart rate. The combinations of the herb may intensify the effect.
脾虛泄瀉者或寒濕而無火者忌用。
藜蘆，苦參及玄參三者均易引致心律失常，血壓下降等反應，配伍應用可能增強毒性作用。
(by Joe Hing Kwok Chu)
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