Theoretically, one sleeping pill can sleep for 2-8 hours, but the specific length of time is related to the different pharmacokinetics of sleeping pills and the patient’s condition. According to their effects, sleeping pills can be divided into short-acting sleeping pills such as midazolam, drug maintenance time of 2-3 hours, mainly for patients who have difficulty falling asleep; medium-acting sleeping pills such as eszopiclone (that is, we know Shule Valium) and alprazolam, drug duration of about 4-5 hours, mainly for shallow sleep, easy to wake up patients; long-acting sleeping pills such as diazepam, clonazepam, mainly for short sleep, early awakening patients, duration of about 6-8 hours. patients with early awakening, lasting about 6-8 hours. The length of sleep maintenance of sleeping drugs is not only related to the variety of drugs, but also with the individual situation of patients, such as some elderly patients, instant oral long-acting sleep drugs, sleep duration can not reach 6-8 hours, and even some patients can only sleep for 2-3 hours after taking, so it needs to be combined with specific patient-specific analysis.