It is true that melatonin should be used with caution in the elderly. Melatonin tablets are health supplements, and since the adverse effects of melatonin are not known, it is recommended that older people take melatonin under the guidance of a doctor. Melatonin mainly improves the quality of sleep, shortens the time of awakening before bedtime and the time of falling asleep. Melatonin can affect the activities of corresponding endocrine glands in the body, and its effects include: regulation of the central nervous system, regulation of the immune system, and regulation of the cardiovascular system. Elderly people with insomnia can take melatonin to help them sleep. But because melatonin for adverse reactions is not clear, too much to take a lower safety, so it is recommended to take under the guidance of a doctor to develop the dose and determine whether there are other disease factors affecting the taking. Daily if the condition of insomnia need to consult a doctor in time, for a variety of causes of the investigation and adjustment. Pay attention to do not drink strong tea before going to bed, develop good sleep habits, reduce the stimulation of unfavorable factors.