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du zhong 杜仲

by: Joe Hing Kwok Chu

Click here to see picture.

Pharmaceutical name:

藥 名 ﹕

Cortex Eucommiae Ulmoidis
Latin botanical name:

學名﹕

Eucommia ulmoide Oliv.

Parabarium spp. and Euonymus spp. are also used as substitutes for this  herb

Pron. in Japanese:

日 語  發 音 ﹕

tochu
Pron. in Korean:

韓 語 發 音 ﹕

tuch'unmg
Pron. in Cantonese:dou6  zung6
Common Name:

英 文 ﹕

eucommia bark
Other Name:

別 名 ﹕

si lian pi 絲連皮、che si pi 扯絲皮、si mian pi 絲棉皮、yu xi pi 玉絲皮、si zhong 思仲
Distribution:

分 佈 ﹕

western part of Henan, southern part of Shaanxi, eastern part of Gansu, Sichuan, Guizhou, Hubei, and some scattered part of Hunan.

河南西部、陜西南部、甘肅東部,四川、貴州、湖北、湖南亦都有零星分 佈。

Properties (characteristics)性 味﹕sweet, slightly acrid, and warm 甘,溫。
Channels (meridians) entered:

歸經﹕

liver and kidney channels

入肝、腎經。

Actions & Indications:

功用﹕

 

 

 

 

Tonic for liver and kidney; strengthening  muscles and bones; and stabilizing pregnancy.補 肝 腎,強筋骨,安胎。

1. use in liver and kidney deficiency: chronic pain in lower back and knees, lack of strength, dizziness, impotence, irregular menses and frequent urination.1: 用於肝腎不足,腰膝疼痛,乏力,眩暈,陽痿,月經不調 ﹐小便頻數等症。

2. use in weakness during pregnancy, unstable pregnancy, chronic pain in lower back and excessive movements of fetus.
2:用於孕婦體虛,胎元不固,腰痠、胎動。
 

Medical Function:

藥 理 ﹕

1. effect on circulatory system

2.  effect on immume system

3. anti inflammatory effect

4. sedative and anesthesia effect

5.  effect on stress

6. effect on uterus

7.  diuretic  effect

8.  anti-aging effect

Chemical ingredients:

化 學 成 份 ﹕

1. (1)[(+) -pinoresinol O-Beta-D-glucopyranoside], [+ - pinoresinol di-O-Beta-D-glucopyranoside] [1], (pinoresinol di-beta-D-glucoside) [2], [+) -1-hydroxypinoresinol 4', 4" - di-O-Beta-D-glucopyranoside][3,8],[(+)-1-hydroxypinoresinol 4'-O-Beta-D-glucopyranoside][4], [(+)-1-hydroxypinoresinol 4"-O-Beta-D-glucopyranoside][4,8],[(+)-epipinoresinol][9].

(2)  [liriodendrin, (+) -syringaresinol-di-O-Beta-D-glucopyranoside][1], [(+)-syringa resinol  O-Beta-D-glucopyranoside][3], (syringylglycerol-Beta-syringaresinol ether 4", 4'"-di-O-Beta-Dglucopyranoside0[6,8], [(+)-syringaresinol monoglucoside][9], (syringin)[7].

(3) [- -olivil 4', 4"-di-O-Beta-D-glucopyranoside][3], [(-) -olivil], [(+)-cyclo-olivil][4], [(-) -olivil 4'-O-Beta-D-glucopyranoside], [(-) -olivil 4"-O-Beta-D-glucopyranoside][5], [(-) -olivil 4', 4"-di-O-Beta-D-glucopyranoside][8].

(4)Medioresinol (+) -Medioresinol di-O-Beta-D-glucopyranoside [1,8], Eucommin A[(+) -medioresinol 4'-O-Beta-D-glucopyranoside][3.8], (+) -Medioresinol monoglucoside [9], Hedyotol C 4", 4'"-di-O-Beta-D-glucopyranoside (guaiacylglycerrol-Beta-medioresinol ether 4", 4'" di-O-Beta-D-glucopyranoside)[5, 8].

(5) (cpmoferom)[7], (dehydrodiconife4ryl alcohol-4, gamma'-di-O0betta-D-glucopyranoside[6,8]

erytho-dihydroxydehydrodiconiferyl alcohol, threo-dihydroydehydrodiconiferyl alcohol.

2. eucommiol [10,11], eucommioside [11], eucommioside-I [8,12]

 

Dosage:

用量﹕

12  to 15 g in decoction.

12 ~ 15 克, 煎服。
 

Samples of formulae:

處 方 舉 例 ﹕

du huo ji sheng tang 獨活寄生湯

tian ma gou teng yin 天麻鉤藤飲

you gui wan  右歸丸 

Modern Usage:

現 代 應 用 ﹕

  •  for rheumatoid arthritis
  •  for sciatica
  •  for hypertension
  1. 風 濕 性 關 節 炎
  2. 坐 骨 神 經 痛
  3. 血 壓 高

 

Cautions:

禁忌﹕

Not suitable for  patients with yinxu (yin deficient) with heat.

 陰 虛火旺者不宜。
 

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Last update: April 4, 2009; 11:58 p.m. LAH