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Yuzhu (Fragrant Solomonseal Rhizome)---玉竹

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Product Description

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This medicinal is the dried rhizome of Polygonatum odoratu (Mill)Druce ( Fam. Liliaceae). It is excavated in autumn and then washed clean . After being dried by natural sunlight, to become soft, it is kneaded and dried repeatedly until it has no hard mass inside. Alternatively, after being fully steamed, it is kneaded to become translucent, and then it is dried by natural sunlight after which it is sliced into thick segments for utilization.

 [ Medicinal Properties ]: Sweet, slightly cold; relate to lung and stomach meridians.

[ Medicinal Efficacies ]: Nourish yin and moisten dryness, promote fluid production ot relieve thirst.

[ Clinical Applications ]: 1. Lung deficiency syndrome and yin deficiency with external contraction   To treat dry cough with little phlegm, hemoptysis and hoarse voice, due to yin deficiency with dryness -heat in the lung, it is prescribed with Shashen, Maidong and Sangye, as in the Shashen Maidong Decoction. To treat hemoptysis, dry throat and aphonia due to yin deficiency with effulgent fire, it is combined with Maidong and Dhuang. This medicinal nourishes yin but does not trap pathogens inside the body. Often it is used for treating exogenous wind-heat with frequent yin insufficiency , manifesting as fever, cough, sore throat and thirst, in combination with Bohe and Dandouchi, such as in the Jiajian Weirui Decoction.

2. Stomach yin deficiency syndrome      It is used to traet dry mouth and tongue, anorexia due to dryness damaging stomach yin, as found in combinatin with Maidong and Shashen. It also treats Xiaoke( diabetes )which is due to stomach heat consuming body fluid, in combination with Shigao, Zhimu and Maidong.

Furthermore, it also nourishes heart yin, clears heart heat and treats dysphoria, excessive sweating, palpitations and fearful throbbings, due to the damage of heart yin by heat.

[ Usage and Dosage ]: 6-12g.

玉竹为百合科植物玉竹Polygonatum odoratum(Mill.)Druce的根茎。主产于湖南、河南、江苏等地。秋季采挖,洗净,晒至柔软后,反复揉搓,晾晒至无硬心,晒干;或蒸透后,揉至半透明,晒干,切厚片或段用。

       【药性】甘,微寒。归肺、胃经。        【功效】养阴润燥、生津止渴。       
 
【应用】        1.肺阴虚证。本品药性甘润,能养肺阴,微寒之品,并略能清肺热。适用于阴虚肺燥有热的干咳少痰、咳血、声音嘶哑等症,常与沙参、麦冬、桑叶等品同用,如沙参麦冬汤(《温病条辨》)。治阴虚火炎,咳血,咽干,失音,可与麦冬、地黄、贝母等品同用。        又因本品滋阴而不碍邪,与疏散风热之薄荷、淡豆豉等品同用,治阴虚之体感受风温及冬温咳嗽,咽干痰结等症,可使发汗而不伤阴,滋阴而不留邪,如加减葳蕤汤(《重订通俗伤寒论》)。       
 
2.胃阴虚证。本品又能养胃阴,清胃热,主治燥伤胃阴,口干舌燥,食欲不振,常与麦冬、沙参等品同用;治胃热津伤之消渴,可与石膏、知母、麦冬、天花粉等品同用,可共收清胃生津之效。       
 此外,本品还能养心阴,亦略能清心热,还可用于热伤心阴之烦热多汗、惊悸等证,宜与麦冬、酸枣仁等清热养阴安神之品配伍。       
 
【用法用量】煎服,6~12g。        【古籍摘要】        1.《神农本草经》:“主中风暴热,不能动摇,跌筋结肉,诸不足”。       
 
2.《日华子本草》:“除烦闷,止渴,润心肺,补五劳七伤虚损”。       
 
3.《本草正义》:“治肺胃燥热,津液枯涸,口渴嗌干等症,而胃火炽盛,燥渴消谷,多食易饥者,尤有捷效”。       
 
【现代研究】        1.化学成分:本品含甾体皂苷(铃兰苦苷、铃兰苷等)、黄酮及其糖苷(槲皮素苷等)、微量元系、氨基酸及其他含氮化合物,尚含粘液质,白屈菜酸、维生素A样物质。       
 
2.药理作用:本品具有促进实验动物抗体生成,提高巨噬细胞的吞噬百分数和吞噬指数,促进干扰素合成,抑制结核杆菌生长,降血糖,降血脂,缓解动脉粥样斑块形成,使外周血管和冠脉扩张,延长耐缺氧时间,强心,抗氧化,抗衰老等作用。还有类似肾上腺皮质激素样作用。       
 
 3.临床研究:据报道,以25g,水煎服,治疗风心病、冠心病或肺心病引起的心力衰竭5例,均在用药5~10日内心衰得到控制(科技医讯,1978,11:26);以玉竹、党参等量,共制为丸剂,治疗高脂血症,有一定疗效(辽宁中医杂志1980,1:6)。
 
本品还有用于高血压病、萎缩性胃炎、黄褐斑等疾病的报道。

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