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Duzhong (Eucommia Bark)---杜仲

Price:
$26.89
Weight:
1.00 LBS
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Product Description

duzhong-yuantai-l.jpgduzhong-yaocai-l.jpg

This medicinal is the dried bark of Eucommia ulmoides Oliv.(Fam.Eucomiaceae). It is harvested between April and June. After removal of its bark, it is piled for sweating out until the interior layers appear purplish-brownish and then it is dried by natural sunlight . It is utilized in its unprocessed or stir-baked with salt water form.

[ Medicinal Properties]: Sweet, warm; relate to liver and kidney meridians.

[ Medicinal Efficacies ]: Tonify kidney and liver; strengthen tendons and bones; prevent abortion.

[ Clinical Applications ]: 1. Syndrome of kidney deficiency, lumbago      It is good at treating lumbago and is especially able to treat that due to kidney-deficiency. In this case, it is used in combination with Hutaorou and Buguhi, as  in the Qing'e Pills. For lumbago with cold sensation due to wind-dampness, it is usually prescridbed with Duhuo and Sanjisheng, as in the Duhuo Jisheng Decoction. In cases of traumatic injuries, it is combined with Chuangxiong and Guixin. To treat menstruation Problems, this medicinal is combined with Danggui and Chuangxiong. For vertigo due to deficiency of liver-kidney yin and hyperactivity of liver yang, it is used in combination with Xiakucao and Sangjisheng. To treat impotence and frequent urination, due to deficiency of kidney-yang, it is often combined with Lurong and Shanyurou.

2. Treatened and habitual abortion    It is effective for threatened abortion, by itself, or used in combination with Sangjisheng and Xudua, as in the Duzhong Pills. For habitual abortion, it is often combined with Chuanduan and Shanyao.

[ Usage and Dosage ]: 10-15g.

[ Precautions ]: Stir-baking enables the active ingredients of Duzhong to be activate by the process of destroying its gelatine content;  therefore the stir-baked form has a more powderful efficacy than the unprocessed form. Being a warm-tonic, it should be used cautiously  in cases of yin deficiency with efulgent fire.

杜仲为杜仲科植物杜仲Eucommia ulmoides Oliv.的树皮。主产于四川、云南、贵州、湖北等地。4~6月采收,去粗皮堆置“发汗” 至内皮呈紫褐色,晒干。生用或盐水炒用。

       【药性】甘,温。归肝、肾经。        【功效】补肝肾,强筋骨,安胎。       
 
【应用】        1.肾虚腰痛及各种腰痛。以其补肝肾、强筋骨,肾虚腰痛尤宜。其他腰痛用之,均有扶正固本之效。常与胡桃肉、补骨脂同用治肾虚腰痛或足膝痿弱,如青娥丸(《和剂局方》);与独活、寄生、细辛等同用,治风湿腰痛冷重,如独活寄生汤(《千金方》);与川芎、桂心、丹参等同用,治疗外伤腰痛,如杜仲散(《圣惠方》);与当归、川芎、芍药等同用治疗妇女经期腰痛;与鹿茸、山萸肉、菟丝子等同用,治疗肾虚阳痿,精冷不固,小便频数,如十补丸(《鲍氏验方》)。       
 
2.胎动不安或习惯堕胎。常以本品补肝肾固冲任安胎,单用有效,亦可与桑寄生、续断、阿胶、菟丝子等同用。如《圣济总录》杜仲丸,单用本品为末,枣肉为丸,治胎动不安;《简便单方》以之与川断、山药同用,治习惯性堕胎。        此外,近年来单用或配入复方治高血压病有较好效果,多与夏枯草、桑寄生、菊花等同用。       
 
【用法用量】煎服,10~15g。       
 
【使用注意】炒用破坏其胶质有利于有效成分煎出,故比生用效果好。本品为温补之品,阴虚火旺者慎用。       
 
【古籍摘要】        1.《神农本草经》:“主腰脊痛,补中,益精气,坚筋骨,强志,除阴下痒湿,小便余沥。久服轻身耐老。”       
 
 2.《别录》:“治脚中酸痛,不欲践地。”       
 
3.《本草正》:“暖子宫,安胎气。”       
 
 【现代研究】        1.化学成分:本品含杜仲胶、杜仲苷、松脂醇二葡萄糖苷、桃叶珊瑚苷、鞣质、黄酮类化合物等。       
 
2.药理作用:杜仲皮煎剂可显著减少小鼠活动次数。杜仲煎剂能延长戊巴比妥钠的睡眠时间,并能使实验动物反应迟钝,嗜睡等。杜仲皮能抑制DNCB所致小鼠迟发型超敏反应;能对抗氧化可的松的免疫抑制作用,具有调节细胞免疫平衡的功能,且能增强荷瘤小鼠肝糖原含量增加的作用,并能使血糖增高。生杜仲、炒杜仲和砂烫杜仲的水煎剂对家兔和狗都有明显的降压作用,但生杜仲降压作用较弱,炒杜仲和砂烫杜仲的作用几乎完全相同,其降压的绝对值相当于生杜仲的两倍。均能对抗垂体后叶素对离体子宫的作用,显著抑制大白鼠离体子宫自主收缩的抑制作用增强。       
 
3.临床研究:用补肾安胎饮治疗习惯性流产(陕西中医,1995,16(2):70)。用杜仲叶和皮片剂治疗高血压,对高血压的主要症状均有一定程度改善(陕西中医,1980,1(4):27)。       

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