Pharmaceutical name:

英文藥 名 ﹕

Cortex Eucommiae Ulmoidis

Biological 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:

粤語發音：

dou6  zung6

Common Name:

英 文普通名﹕

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，略辛，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

1. use in liver and kidney deficiency: chronic pain in lower back and knees, lack of strength, dizziness, impotence, irregular menses and frequent urination.

2. use in weakness during pregnancy, unstable pregnancy, chronic pain in lower back and excessive movements of fetus.

3. use in hypertension

補 肝 腎，強筋骨，安胎。

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. 用於孕婦體虛，胎元不固，腰痠，胎動。

3. 用於血壓高:
    

Medical Function:

藥 理 ﹕

1.  effect on circulatory system

2.  effect on immune 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

9.  lowering blood pressure effect.

10.  antibiotic effect:.it can inhibit Shigella flexneri, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus pneumoniae, Bacillus anthracis

11. 對血液循環作用

12. 對免疫作用

13. 抗炎作用

14. 鎮靜止痛作用

15. 抗心理壓力作用

16. 排水作用

17. 抗老作用

18. 抗菌作用：杜仲水煎劑對結核桿菌，福氏痢疾桿菌，大腸桿菌， 綠膿桿菌，金黃色葡萄球菌，肺炎球菌，炭疽桿菌等有明顯抑制作用

19. 降血壓作用

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　

gu shen an tai yin 固腎安胎飲

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.

According to Ben Cao Jing Shu, this herb is not suitable for those who are kidney deficient with high heat. If to use it, it should be used with huang bai and zhi mu.

 陰 虛火旺者不宜。

《 本草經疏 》︰" 腎虛火 熾者不宜用。即用當與黃 柏 ，知 母同入。"