Biological name 學名﹕
Eucommia ulmoide Oliv.
Parabarium spp. and Euonymus spp. are also used as substitutes for this herb
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. 降血壓作用
19. 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
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﹕
1. for rheumatoid arthritis
2. for sciatica
3. 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。"
[n] see Research Librarian
(by Joe Hing Kwok Chu)
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