Generally, it is best to take Chinese medicine half an hour-one hour after meals. A pair of medicine, boiled twice to drink well. 1. Do Chinese medicines need to be cleaned before decoction? Chinese herbal medicines are mostly crude drugs, which are generally processed before sale, and there is generally no need to elutriation before decoction. If you really feel that the herbs are dirty, you can rinse them with water quickly before soaking. Don't soak them, so as to prevent a large number of effective components that are easily soluble in water from being lost, thus affecting the curative effect of traditional Chinese medicine. Second, which utensils should be selected for Chinese medicine decoction? Pot and casserole are generally the best utensils for decocting medicine, but enamel and stainless steel are also acceptable, but aluminum, iron and bronze are forbidden to prevent these metal objects from reacting with medicine, affecting the curative effect of medicine and even harming human body. Li Shizhen once said, "Anyone who decocts medicine and avoids copper and iron should use silverware crock.". At present, the ceramic casserole with cover is generally used. 3. What is the decocting procedure of traditional Chinese medicine? ① Soak: Pour the medicine into the medicine pot and spread it out, then add cold water to an inch higher than the plane of the medicine, and soak for 0.5-1hour. In winter, soaking in warm water of 20-30 degrees can shorten the decocting time, but boiling water can't be used, so as to avoid protein in some plant cells from being suddenly heated and solidified, forming a dense envelope on the outer layer, or causing some high molecular substances to form colloid, which is unfavorable for the leaching of effective components. However, the soaking time should not be too long, especially in summer, so as to avoid drug enzymolysis and mildew. If there are many mosaic drugs in the prescription and the water absorption is large, water should be added before decocting to make the water about1-2 cm higher than the drug level. ② Generally, strong fire (urgent fire) should be used before the medicine is boiled, and it should be changed to slow fire (slow fire) after boiling. However, some traditional Chinese medicines for treating exogenous diseases can be boiled without slow fire and continue to be decocted with strong fire for about 5 minutes. ③ The decocting time should depend on the nature of drugs and diseases, the difficulty of dissolution of effective components and the situation of drug use. Generally speaking, it takes 20-25 minutes to calculate the boiling time of the first decoction, the second decoction15-20 minutes, the first decoction 10 ~15 minutes and the second decoction10 minutes. The tonic head should be decocted for 30-40 minutes, and the second decoction for 25-30 minutes. If the medicine is decocted first, it needs to be decocted for10-30 minutes, and then the medicine should be put into the pot at the last 5-10 minutes. (4) After the second decoction (re-decoction) is finished, the decoction is filtered out, cold water is added again until it is about 0.5-1cm higher than the medicine level, and the decoction is continued with strong fire until it boils, and then it is decocted with slow fire15-20 minutes. IV. Explanations on the first decoction, later decoction, package decoction, oral administration and melting of drugs (1) The purpose of first decoction is to increase the solubility of drugs, reduce the toxicity of drugs and give full play to the curative effect. (1) Minerals: shellfish and carapace drugs, because of their hard texture, the effective components are not easy to fry, so they must be fried first. Such as gypsum, mirabilite, halloysitum rubrum, magnetite, ochre, pumice, lapis lazuli, native copper, oyster, concha Haliotidis, mother of pearl, concha meretricis seu cyclinae, concha arcae, tortoise plastron, turtle shell, pangolin scales, keel, dragon teeth, turtle shell, buffalo horn, etc., can be smashed and fried for 30 minutes. (2) Poisonous drugs, such as Aconitum, Radix Aconiti Lateralis, etc., should be decocted for1~ 2 hours first, and the purpose of attenuation or detoxification can be achieved by decocting first and for a long time. ③ Some plant medicines, such as Tianzhu Huang, Cannabis, Dendrobium, are only effective if they are decocted first. (2) The purpose of "down after down" is to reduce the loss of volatile oil and prevent the effective components from decomposition and destruction. (1) Drugs with fragrant smell and containing a lot of volatile oil, such as mint, agastaches, aucklandia root, cardamom, Amomum villosum, Amomum villosum, sandalwood, Dalbergia odorifera, Aquilaria Resinatum, Artemisia annua, Asarum, etc., should be taken later, and the medicine is usually taken 5 ~10 before the decoction of traditional Chinese medicine is decocted. ② Drugs that should not be decocted for a long time, such as Uncaria rhynchophylla, almond, rhubarb, senna and so on, should be decocted later. (3) Bao Jian ① Pollen drugs, such as pollen and pollen typhae; Small seed drugs, such as lepidium; Fine powder of medicine, such as indigo naturalis, should be fried. ② Drugs containing more starch and mucilage, such as Semen Plantaginis, are easy to stick to the pan for gelatinization and coking during the boiling process, so they need to be fried. (3) For drugs with fluff, such as Inula flower, it can be avoided that fluff falls off and mixes into the soup to stimulate the throat and cause cough. (4) Melting and rushing into some glues or sugars, such as donkey-hide gelatin, antler glue, honey, maltose, etc., should be melted with appropriate amount of boiling water and rushed into the soup or melted into the soup. If they are mixed, the viscosity of the liquid medicine will be high, which will affect the dissolution of other components, and the gum will also suffer certain losses. (5) Generally, the drugs with large volume and large water absorption such as loofah sponge, kitchen soil, Lysimachia christinae, glutinous rice root, etc. should be decocted with water first, and the obtained medicine juice should be removed before decocting other drugs. (6) Dissolved mirabilite, Natrii Sulfas, etc. can also be dissolved and washed into decoction for application. (7) After being decocted, some valuable drugs such as ginseng, American ginseng, pilose antler, etc. can be decocted separately, and the juice can be mixed into the decocted decoction for taking. (8) Raw juice, such as fresh rehmannia juice, raw lotus root node, pear juice, leek juice, ginger juice, cogongrass rhizome juice, bamboo juice, etc., should not be decocted, but can be taken in the cooked decoction. (9) Take some valuable drugs whose active ingredients are insoluble in water or easy to decompose after heating, such as ginseng powder, Calculus Bovis powder, Antelope powder, panax pseudo-ginseng, Moschus powder, Scorpio powder, Cinnamomum cassia powder, Kansui powder, etc., and mix the powder with the decocted decoction and take it after stirring. Five, a pair of Chinese medicine should be boiled several times as well? Generally speaking, the effective components of a pair of Chinese medicines have been greatly reduced after being decocted twice, so it is better to decoct twice. However, for the prescription with large dosage, there may be more effective components left after two decoctions, so it can be decocted for the third time and taken three times a day to save Chinese medicine resources and improve the curative effect to a certain extent.