Melatonin is one of the hormones secreted by the pineal gland of the brain and is also known as pinealotropin melatonin. Generally there is no specified time for stopping the drug, most of them are stopped after 1~3 months of taking the drug, and the specific time for stopping the drug should be decided according to the development of the patient’s condition. Melatonin is a drug that replenishes melatonin in the human body, and its main role is that it can improve the quality of sleep, increase the duration of sleep, and also relieve symptoms such as depression. It is recommended to take the medication as prescribed by your doctor. If side effects occur after taking melatonin, the drug needs to be stopped immediately, and continuing to take it may bring harm to the body. After taking melatonin insomnia has improved, you can gradually reduce the amount under the guidance of the doctor, the specific time to stop taking the drug should be based on the condition of judgment, but there is no guarantee that after stopping the drug will still have insomnia. Insomnia is relatively common in daily life, but it is not recommended that long-term use of melatonin, you can properly regulate diet and physical exercise, regular life to improve, so as to regulate the quality of sleep.