Concentrated decoction is an extracted and refined herbal medicine, which absorbs the essence of herbs and is mainly nourishing, so that it can achieve the therapeutic effect of harmonizing yin and yang, benefiting qi and nourishing blood, and helping to eliminate evil. From the perspective of modern medicine, regulation and improvement of human immunity should be the main mechanism of action of concentrated decoction. 1.Concept Concentrated decoction is a concentrated preparation of water decoction of Chinese medicine compound, or a liquid preparation for internal use made by extracting, refining and concentrating Chinese medicine compound with water as solvents. 2. Advantages (1) It can leach a variety of active ingredients in the herbs to ensure the comprehensive therapeutic effect of the preparation; (2) Like tonics, it is absorbed quickly and works quickly; (3) It can be taken for a longer period of time, eliminating the trouble of using decoction, and is convenient to apply; (4) It has less influence on the spleen and stomach, and reduces the nourishment of gum substances. (5) Concentration process reduces the dosage and adds more corrective agents, which is easily accepted by patients; (6) The finished product is sterilized and sealed, with stable quality; if packed in single dose, it is more convenient and accurate to carry, preserve and take. 3.Adapted to the population The decoction is mainly nourishing, with the effect of harmonizing yin and yang, benefiting qi and nourishing blood, helping to eliminate evil. From the perspective of modern medicine, regulating and improving human immunity should be the main mechanism of action of concentrated decoction. It is suitable for the following groups of people: (1) Those who do not have chronic diseases but are weak and have frequent colds in spring and summer. (2) Children: Children can apply concentrated decoction according to their growth needs, especially for children with developmental delay, recurrent respiratory infections, bronchial asthma, anorexia, anemia, etc. It is suitable for children with physical weakness. (3) Sub-healthy people: Young and middle-aged people with excessive workload (mainly mental tension and brain overdraft) and excessive physical exertion, which makes it difficult for them to recover. (4) Patients with chronic diseases: Patients with chronic diseases have reduced systemic functions and weakened gastrointestinal digestive functions, such as chronic digestive diseases, chronic cardiovascular diseases and tumor patients after radiotherapy and chemotherapy. (5) Post-illness, post-operative and post-natal conditioning: such patients are weak and their systemic organ functions are reduced, so they often need to take tonics. (6) Women: due to physiological factors such as menstruation and childbirth, women are prone to menstrual disorders, menopausal syndrome, deficiency of qi and blood, weakness of the spleen and stomach and premature aging. Patients with conditions such as chronic pelvic inflammatory disease and those with hair loss and chloasma can take a comprehensive tonic. (7) Children: Children can apply the concentrated decoction according to their growth needs, especially for children with developmental delay, recurrent respiratory infections, anorexia, anemia and other deficiencies. (8) Elderly people, whose body is in the aging stage, can improve a series of symptoms such as lack of qi and blood, loss of energy, graying of hair, loss of eyesight, dizziness and tinnitus, poor memory, short sleep at night, back pain, fatigue, etc. through concentrated decoction. (9) The body has some chronic diseases have recovered or not cured, but relatively stable, take concentrated decoction to continue treatment, consolidate the efficacy, improve symptoms and increase physical fitness. (10) Those with diminished sexual function. (11) Patients discharged from hospital with oral Chinese medicine. 4. Precautions (1) Avoid alcohol and tobacco, coffee, cola and other caffeine-containing beverages, cold and slippery products, greasy food and seafood; avoid radish, lycopodium, black tea and green tea if the decoction contains ginseng; avoid pig’s blood, sheep’s blood and iron if it contains heshouwu; do not take the decoction with milk. During the consumption period, if you encounter cold and fever, cough and phlegm, acute abdominal pain, depression and headache, gastrointestinal disorders, etc., you should suspend the consumption and take it again after it is cured. (2) Storage method: A single dose of concentrated decoction can be taken for 4 weeks, and care should be taken to prevent moisture and mildew when storing. When it is not opened, it can be stored at room temperature, but after opening, it must be refrigerated and has a shelf life of 7 days. The shelf life is 4 days. Open the cap for a short time each time, pour out an appropriate amount (as prescribed by the doctor) of the medicine and then take it, do not drink directly from the bottle to avoid contamination. Do not drink directly from the bottle to avoid contamination. Check the liquid in the bottle before taking the medicine, if there is mold, do not take it. The finished product is allowed to have a small amount of lightly shaken precipitation during storage. 5.Dosage Oral: 25ml twice a day, as prescribed by the doctor, before meals, one hour after meals for poor gastrointestinal function. For heart and spleen tonic, sedative and tranquilizer, and concentrated decoction for the treatment of enuresis, it should be taken 20 minutes before bedtime. Please follow the doctor’s instructions for special dosage.