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Xiyangshen (American Ginseng)---西洋参(powder100g/bottle)

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Product Description

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This medicinal is the dried root of Panax puinguefolium L.(Fam. Araliaceae), which is mainly produced in America and Canada and cultivated in China as well. Its roots areexcavated in autumn after the plant has been growing for 3-6years. Then it is sliced and used in its unprocessed form.

[ Medicinal Properties ]: Sweet, slightly bitter, cool; relate to lung, heart and kidney meridians.

[ Medicinal Efficacies ]: Tonify qi and nourish yin; clear heat and promote fluid production.

[ Clinical Applications ]: . 1. Syndrome of both qi and yin deficiency    For lassitude, lack of strengthen, shortness of breath, dyspnea, spontaneous sweating with warm and sticky sweat, dysphoria and thirst due to consumption of primordial qi and yin fluid, it is usually used in combinaitn with Maidong, Wuweizi. For palpations, angina pectoris, insomnia and dream-disturbed sleep, it is combined with Gancao and Maidong as well.

2.Lung of qi deficiency syndrome and lung yin deficiency syndrome     For shortness of breath, dyspnea, cough with little or bloody sputum, due to the damage to qi and yin of the lung by fire-heat pathogens, it is usually combined with Yuzhu and Maidong.

3. Thirst due to qi deficiency and consumption of fluid in febrile diseases; Xiaoke(similar to diabetes ) In this cases, it is usually used in combination with fresh Shengdihuang, fresh Shihu and Maidong.

[ Usage and Dosage ]: 3-6g, decocted separately. Its decoction is taken orally and used in mixture with other medicinal herbs.

[ Precautions ]: It is recorded in pharmacopoeia that Xiyangshen should not be used in combination with Lilu.

[Medicinal Comparison ]: Similarities: Both Renshen and Xiyangshen have similar funcitons of tonifying primordial qi and are indicated for prostration syndrome manifested as shortness of breath, lassitude, thin and feeble pulse. But the former is more effective for treating prostration syndrome. The latter, bitter and cool, has the added funciton of nourishing yin and is suitable for the treatment of febrile disease with prostration of both qi and yin. Furthemore, both can tonify the spleen qi and lung qi and are used to treat deficiency syndrome of spleen-lung qi.

Differences: Renshen is stronger in tonifying and Xiyangshen is used more in treating deficiency syndrome of both qi and yin of the spleen and lung. Due to their function of tonifying qi and promoting fluid production, both are used to treat consumption of fluid manifested as thirst and Xiaoke(Similar to diabetes). In addition, Renshen has the actions of tonifying heart-kidney qi, inducing tranquilization and improving intelligence and is used to treat insomnia, amnesia, palpitations, fearful throbbing and dyspnea, shortness of breath due to the kidney failure in receiving qi.

西洋参为五加科植物西洋参Panax quinquefolium L.的根。主产于美国、加拿大。我国北京、吉林、辽宁等地亦有栽培。秋季采挖生长3~6年的根,切片生用。

       【药性】甘、微苦,凉。归肺、心、肾、脾经。        【功效】补气养阴,清热生津。       
 
【应用】        1.气阴两伤证。本品亦能补益元气,但作用弱于人参;其药性偏凉,兼能清火养阴生津。适用于热病或大汗、大泻、大失血,耗伤元气及阴津所致神疲乏力,气短息促,自汗热粘,心烦口渴,尿短赤涩,大便干结,舌燥,脉细数无力等证。常与麦冬、五味子等养阴生津,敛汗之品同用。       
 耗伤肺脏气阴所致短气喘促,咳嗽痰少,或痰中带血等症。可与养阴润肺的玉竹、麦冬,清热化痰止咳之川贝母等品同用。       
 此外,本品还能补心气,益脾气,并兼能养心阴,滋脾阴。治疗气阴两虚之心悸心痛,失眠多梦。可与补心气之甘草,养心阴、清心热之麦冬、生地等品同用。治疗脾气阴两虚之纳呆食滞,口渴思饮。可与健脾消食之太子参、山药、神曲、谷芽等品同用。肾阴不足之证亦可选用。       
 
 3.热病气虚津伤口渴及消渴。本品不仅能补气、养阴生津,还能清热,适用于热伤气津所致身热汗多,口渴心烦,体倦少气,脉虚数者。常与西瓜翠衣、竹叶、麦冬等品同用,如清暑益气汤(《温热经纬》)。临床亦常配伍养阴、生津之品用于消渴病气阴两伤之证。       
 
【用法用量】另煎兑服,3~6g。        【使用注意】据《药典》记载,本品不宜与藜芦同用。       
 
【鉴别用药】人参与西洋参均有补益元气之功,可用于气虚欲脱之气短神疲、脉细无力等症。但人参益气救脱之力较强,单用即可收效;西洋参偏于苦寒,兼能补阴,较宜于热病等所致的气阴两脱者。二药又皆能补脾肺之气,可以主治脾肺气虚之证,其中也以人参作用较强;但西洋参多用于脾肺气阴两虚之证。此二药还有益气生津作用,均常用于津伤口渴和消渴证。此外,人参尚能补益心肾之气,安神增智,还常用于失眠、健忘、心悸怔忡及肾不纳气之虚喘气短。       
 
【古籍摘要】        1.《本草从新》:“补肺降火,生津液,除烦倦。虚而有火者相宜。”       
 
 2.《医学衷中参西录》:“能补助气分,兼能补益血分,为其性凉而补,凡欲用人参而不受人参之温补者,皆可以此代之。”       
 
【现代研究】        1.化学成分:本品含多种人参皂苷、多种挥发性成分、树脂、淀粉、糖类及氨基酸、无机盐等。       
 
 2.药理作用;西洋参有抗休克作用,能明显提高失血性休克大鼠存活率;对大脑有镇静作用,对生命中枢则有中度兴奋作用;还具抗缺氧、抗心肌缺血、抗心肌氧化、增加心肌收缩力、抗心律失常、抗疲劳、抗应激、抗惊厥、降血糖、止血和抗利尿作用。       
 
 3.临床研究:据报道,以西洋参配伍龙眼肉等,治疗气虚证患者32例,可使主要症状消失,体重增加,血红蛋白及减少的白细胞升高,有效率达84.4%(福建中医药,1986,3:63)。       
 
4.不良反应:近年有口服西洋参引起过敏反应,出现水泡疹及女性内分泌失调的报道,应加以注意。

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