Melatonin is not a drug, it is a kind of health care product that simulates the hormone secreted in the body. In our country, melatonin is only approved to be sold as health food, and cannot replace drugs to treat insomnia. Melatonin is an amine hormone, the human body will also naturally secrete melatonin, it is secreted by the pineal gland in the brain an amine hormone, helps to shorten the time to fall asleep, improve the quality of sleep, and so on, only on the biological clock disorders caused by sleep disorders have a certain effect. In our country melatonin is only approved as health food, the user’s sleep in specific conditions have certain auxiliary effect, but can not replace the clinical treatment of insomnia in the special drugs. Melatonin is a health food, try to standardize its use under the guidance of a doctor. If you have insomnia symptoms, please go to the regular hospital as soon as possible, active treatment, so as not to delay the condition.