Benzodiazepines are a large class of drugs that have sedative-hypnotic, anxiolytic, and antiepileptic effects, but also have some side effects. Benzodiazepines act on the limbic system of the brain and the reticular formation of the brainstem, and have a depressant effect mainly on the central nervous system. Therefore, they have a sedative-hypnotic effect and can be used for insomnia, such as difficulty in falling asleep, early awakening, and inability to continue to sleep after waking up. In addition, there is an anxiolytic effect, can be used for alcohol withdrawal syndrome drug replacement therapy. It can also be used in the treatment of status epilepticus, acting as an antiepileptic. Benzodiazepines also have side effects such as dizziness, drowsiness, and weakness, and overdose can lead to coma and respiratory depression. Intravenous injection can cause depression of the cardiovascular system when given too quickly. Long-term use can lead to addiction and dependence. Reverse withdrawal syndrome occurs when the drug is discontinued, including insomnia and anxiety. Therefore, when taking benzodiazepines, take them under the guidance of a medical professional. If adverse reactions occur, you should go to the hospital as soon as possible.