Huangjing ( Solomonseal RHizome)---黄精

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Huangjing ( Solomonseal RHizome)---黄精

Huangjing ( Solomonseal RHizome)---黄精

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Product Description

This medicinal is the dried rhizome of PolygonatuKingianum Coll. et Hemsl.and P.sibiricaum Red. or P.cyrtonema Hua (Fam. Liliaceae). It is excavated in spring and autumn. After being washed clean, it is slightly scalded in boilig water or it is fully steamed, and then dried to be sliced into thick segments for utilization.

[ Medicinal Properties ]: Sweet, neutral; relate to spleen, lung and kidney meridians.

[ Medicinal Efficacies ]: Tonify qi and nourish yin; invigorate the spleen; moisten the lung; reinforce the kidney.

[ CLinical Applications ]: 1. Lung yin deficiency with interior dryness It treats dry cough with little sputum, chronic and consumptive cough due to deficiency of lung-kidney yin. In order to treat dry cough with little sputum, due to damage of both lung yin and lung qi, it is combined with Shashen and Chuanbeimu. In treating chronic and consumptive cough, due to deficiency of lung-kidney yin, it is processed into paste, with or without Shudihuang and Baibu.

2. Spleen deficiency syndrome with yin consumption To treat sallow complexion, lassitude, lack of strength, dry mouth, anorexia, dry stools, due to spleen deficiency of both qi and yin, it is used by itself or in combination with Dangshen, Fling and Baizhu.

3. Deficiency of kidney essence It is used to treat dizziness, soreness and weakness in the lummbar region and knees, and early graying of hair. By itself, it is decocted into paste, as in Huangjing Concentrated Decoction or used in Combination with Gouqizi and Heshouwu.

[ Usage and Dosage ]: 9-15g.

黄精为百合科植物黄精Polygonatum sibiricum Red.、滇黄精P.kingianum Coll.et Hemsl.或多花黄精P.cy, it rtonema Hua的根茎。黄精主产于河北、内蒙古、陕西；滇黄精主产于云南、贵州、广西. ；多花黄精主产于贵州、湖南、云南等地。春秋二季采挖，洗净，置沸水中略烫或蒸至透心，干燥，切厚片用。

【药性】甘，平。归脾、肺、肾经。【功效】补气养阴，健脾，润肺，益肾。

【应用】 1．阴虚肺燥，干咳少痰及肺肾阴虚的劳咳久咳。本品甘平，能养肺阴，益肺气。治疗肺金气阴两伤之干咳少痰，多与沙参、川贝母等药同用。因本品不仅能补益肺肾之阴，而且能补益脾气脾阴，有补土生金、补后天以养先天之效。亦宜用于肺肾阴虚之劳嗽久咳。因作用缓和，可单用熬膏久服。亦可与熟地、百部等滋养肺肾、化痰止咳之品同用。

2．脾虚阴伤证。本品能补益脾气，又养脾阴。主治脾脏气阴两虚之面色萎黄、困倦乏力、口干食少、大便干燥。本品能气阴双补，单用或与补气健脾药同用。

3．肾精亏虚。本品能补益肾精，对延缓衰老，改善头晕、腰膝酸软、须发早白等早衰症状。有一定疗效。如黄精膏方（《千金方》）单用本品熬膏服。亦可与枸杞、何首乌等补益肾精之品同用。

【用法用量】煎服，9～15g。

【鉴别用药】黄精与山药，均为性味甘平，主归肺、脾、肾三脏，气阴双补之品。然黄精滋肾之力强于山药，而山药长于健脾，并兼有涩性，较宜于脾胃气阴两伤，食少便溏及带下等证。

【古籍摘要】 1．《日华子本草》：“补五劳七伤，助筋骨，生肌，耐寒暑，益脾胃，润心肺”。

2．《本草纲目》：“补诸虚……填精髓”。

【现代研究】 1．化学成分：本品含黄精多糖、低聚糖、粘液质、淀粉及多种氨基酸（囊丝黄精还含多种蒽醌类化合物）等成分。

2．药理作用：黄精能提高机体免疫功能和促进DNA、RNA及蛋白质的合成，促进淋巴细胞转化作用；具有显著的抗结核杆菌作用；对多种致病性真菌有抑制作用；对伤寒杆菌、金黄色葡萄球菌也有抑制作用；有增加冠脉流量及降压作用，并能降血脂及减轻冠状动脉粥样硬化程度；对肾上腺素引起的血糖过高呈显著抑制作用；还有抑制肾上腺皮质的作用和抗衰老作用。

3．临床研究：据报道，以黄精配伍加味建中汤、治疗慢性胃炎86例，治愈35例，有效42例（中医杂志，2000，9：521）。以黄精、党参各30g，炙甘草10g，水煎顿服，治疗低血压10例，有近期疗效（中级医刊，1981，12：31）；本品还有用于治疗冠心病、糖尿病、白细胞减少症、高脂血症、肺结核、药物中毒性耳聋、失眠等疾病的报道。