Du Zhong is the bark of the plant EucommiaulmoidesOliv. It is mainly produced in Sichuan, Yunnan, Guizhou, Hubei, etc. Harvested in April to June, remove the coarse skin pile "sweating" to the inner skin is purple-brown, sun-dried. It is used raw or fried in salt water.
Medicinal properties sweet, warm. It belongs to the liver and kidney meridians.
Effects Tonifying the liver and kidney, strengthening the muscles and bones, and tranquilizing the fetus.
Applications
1. Kidney deficiency and all kinds of lumbago. With its tonic liver and kidney, strong muscles and bones, kidney deficiency lumbago is particularly suitable. Other lumbago with it, all have the effect of correcting and strengthening the root. Often used with walnut meat, bone marrow to treat kidney deficiency lumbago or foot and knee impotence, such as Qing'e Pill ("He Diao Guan Fang"); with Duhuo, parasitic, fine Xin, etc., the treatment of rheumatism and lumbago, cold and heavy, such as Duhuo parasitic soup ("Thousand Jin Fang"); with Rhizoma Ligustici Chuanxiong, Gui Xin, Danshen, etc., the treatment of traumatic lumbago, such as Cortex Dulcis (Sheng Huifang); and Angelica sinensis, Rhizoma Ligustici Chuanxiong, Paeoniae Alba for the treatment of women's menstrual lumbago; and antler velvet, cornelian cherry, codonopsis, etc., used together. It is also used with deer antler, cornelian cherry, cuscuta to treat impotence of kidney deficiency, coldness of semen, and frequent urination, such as Ten Complementary Pills ("Bao's Examination and Recipes").
2. Fetal restlessness or habitual abortion. This product is often used to tonify the liver and kidney, solid Chong Ren to stabilize the fetus, effective alone, can also be used with Sang Mang Sheng, Sequel, Agaricus, Cuscuta and so on. Such as the "General Records of the Holy Spirit" Duzhong pill, single use of this product for the end, jujube meat for the pill, the treatment of fetal restlessness; "Simple single formula" with Chuanjian, yam, used together, the treatment of habitual abortion.
In addition, in recent years, it is used alone or in compound prescription to treat hypertension with good effect, mostly used with Xia Gu Cao, Sang Mang Sheng and Chrysanthemum.
Usage and dosage of decoction, 10 ~ 15g.
Use of attention to frying to destroy the gelatinous is conducive to the effective components of the decoction, so it is better than the raw effect. This product is a warm tonic products, Yin deficiency and fire should be used with caution.
Abstract
1. Shennong Ben Cao Jing: "the main waist and spine pain, tonifying the middle, beneficial to the essence, strong muscles and bones, strong will, in addition to the yin under the itching wet, urinary leaking. Taken for a long time, it lightens the body and endures old age."
2. "Bielu": "Treatment of soreness in the feet, do not want to trample the ground."
3. "Materia Medica Zheng": "Warms the uterus and pacifies the fetus."
Modern Research
1. Chemical Composition: This product contains eucommia gum, eucommia glycoside, turpentine diglucoside, peach leaf coral glycoside, tannin, flavonoids and so on.
2. Pharmacological effects: Eucommia bark decoction can significantly reduce the number of activities in mice. Cortex Eucommiae Decoction can prolong the sleep time of sodium pentobarbital, and can make experimental animals unresponsive, drowsiness, etc.. Cortex Eucommia bark can inhibit the delayed-type hypersensitivity reaction in mice caused by DNCB; it can immunosuppress the immunosuppressive effect of antioxidant cortisone, has the function of regulating the balance of cellular immunity, and enhances the effect of the increase in the content of hepatic glycogen in homozygous mice, and increases the blood glucose. The aqueous decoction of raw Cortex Eucommiae, fried Cortex Eucommiae and sand-scalded Cortex Eucommiae had obvious antihypertensive effects on rabbits and dogs, but the antihypertensive effects of raw Cortex Eucommiae were weaker, and the effects of fried Cortex Eucommiae and sand-scalded Cortex Eucommiae were almost identical, with the absolute value of antihypertensive effects equal to twice that of raw Cortex Eucommiae. All of them were able to counteract the action of pituitary posterior lobe hormone on isolated uterus, and significantly inhibited the enhanced inhibition of autonomous contraction of isolated uterus in rats.
3. Clinical research: treating habitual abortion with tonifying the kidney and tranquilizing the fetus drink (Shaanxi Traditional Chinese Medicine, 1995, 16(2):70). Treatment of hypertension with tablets of leaves and bark of Cortex Eucommia Ulmoides showed some degree of improvement in the main symptoms of hypertension (Shaanxi Traditional Chinese Medicine, 1980, 1(4):27).
Efficacy
(1)Lowering blood pressure
Duzhong infusion has been used to treat hypertension in clinical practice, which can make the blood pressure of hypertensive patients decrease, but the value of the decrease is limited and cannot be decreased continuously, which may be related to the efficacy of dilation of blood vessels of Duzhong, indirectly increase the total volume of blood vessels, the blood pressure is relatively decreased, and has a therapeutic effect on the dizziness caused by high blood pressure. Symptoms have a therapeutic effect.
(2)Diuretic effect
Duzhong contains a large amount of potassium, its potassium content is about 0.4%, consuming dishes made of Duzhong or traditional Chinese medicine will intake a large amount of potassium ions, which can regulate the function of the kidneys and promote urination.
Experimental results: various preparations of Cortex Eucommiae have diuretic effect on anesthetized dogs, and there is no "fast tolerance" phenomenon. It also has diuretic effect on normal rats and mice.
(3)Sedative-hypnotic
The experimental dogs with large doses of Cortex Eucommiae decoction by gavage can make the dogs quiet and sleepy, and even in the case of a lot of external environmental disturbances will not show excitement, and has a strong sedative-hypnotic effect. At the same time, dulcimer can reduce blood pressure, so taking dulcimer has a good therapeutic effect on insomnia caused by high blood pressure.
(4) Cosmetology
Experiments show that eucommia can enhance the vitality of SOD in red blood cells of mice and enhance their adrenal weight. Eucommia can normalize the low physiological function, suggesting that Eucommia has a certain anti-aging effect.
Duzhong contains a large number of mineral elements, including high content of zinc, which can accelerate the repair of wounds, ulcers, surgical wounds, etc., and play a specific role in promoting cell division of lymphocytes, which suggests that zinc has a role in delaying aging.
(5) Foetal safety
Experiments show that the decoction of Cortex Eucommiae in large doses on the mouse also has the effect of inhibiting the central nervous system, on the isolated uterus of rats and rabbits, can inhibit the excitatory effect induced by the posterior lobe of the pituitary gland, so that the uterus relaxes.
China's traditional Chinese medicine, many of the prescriptions to protect the fetus, there are also components of eucommia, which can be seen, eucommia can make the human uterus relax, to protect the fetus has a certain role.