The duration of effect of 1 Zopiclone tablet is about 5 hours, but the exact duration of sleep also needs to vary from person to person. Zopiclone is a representative of the third generation of sedative-hypnotic drugs, which not only has sedative, anxiolytic and anticonvulsant effects, but also possesses muscle relaxation effects, so it is a better sedative drug. At the same time, long-term clinical trials and applications have shown that the drug is characterized by precise efficacy and fewer adverse reactions. Zopiclone has certain advantages compared with other sedative-hypnotic drugs, first of all, its action time is longer and its action is more rapid, generally the effective time can last for 5 hours, and the patient can fall asleep quickly after taking the drug and can maintain sufficient depth of sleep, and has lighter after-effects and hangover phenomenon than benzodiazepines. There is no significant drug resistance or discontinuation rebound with long-term use. Note that this drug is contraindicated in patients who are allergic to zopiclone, patients with myasthenia gravis, and patients with severe respiratory insufficiency. If you need to use the drug, be sure to take it under the supervision of a doctor.