The dose of half a sleeping pill is usually less than the recommended dose for use, and the side effects experienced by patients without contraindications to its use or specific underlying medical conditions are usually not too severe. Sleeping pills are drugs with sedative-hypnotic effects, and most of them act directly on the central nervous system, so their side effects mostly include drowsiness, dizziness, weakness, ataxia and other neurological symptoms, as well as the possibility of psychiatric disorders such as euphoria, agitation and hallucinations. Long-term continuous use of such drugs can produce dependence and addiction, and withdrawal symptoms may also occur when the drug is discontinued. Different kinds of sleeping pills, the majority of its adverse reactions are not the same, the use of contraindications and precautions are also different. For example, when taking diazepam tablets, pregnant women, women during pregnancy and newborns are prohibited, but when using zopiclone tablets, patients with myasthenia gravis, patients with severe respiratory insufficiency are prohibited and so on. If there is a need to use this type of drug patients, be sure to be under the guidance of a professional doctor, strictly comply with the doctor’s instructions to take medication, do not self-administer arbitrary medication. If adverse reactions occur after taking the drug, it is recommended to consult a doctor in time to avoid delaying the condition.