Randomised, Double-blind Study to Investigate the Safety and Efficacy of Brotizolam in Insomnia Outpatients.

Inclusion criteria

Inclusion\_Criteria: Patients will be eligible for enrollment of this study if they meet all of the following criteria: * Willing and able to provide written informed consent * Male or female, aged 18 - 65 (including 18 and 65) * Diagnosed as insomnia by the criteria of CCMD-3: Exclusion\_Criteria: * Who received any central nervous system drugs within one week before visit 2(baseline) * Continuous use of hypnotic agents for more than 3 months recently * History of inefficiency with benzodiazepine-type hypnotics * Who have a history of obvious hypersensitivity * Hamilton Depression Rating Scale (HAMD)18 * Who was diagnosed with other mental illness * With serious diseases of heart, liver and kidney, etc * Who had sleep apnoea syndrome * Who had epileptic seizures within one year * With angle closure glaucoma that is acute or easy to occurred * Whose AST or ALT values are 2 times of normal upper limit * Whose Cr or BUN values are 2 times of normal upper limit * Who are known to be prone to the abuse of alcohol (i.e. history of evidence of acute or chronic abuse), or any other addictive agents * Who is participating in other clinical trial, or have participated in a clinical study of any other drug in one month prior to visit 2 (baseline). In addition, patients who has been randomized in this trial and then withdrew can not be enrolled again. * All pregnant, lactational women and women who have the plan of pregnancy. * Who are unwilling to or not able to complete the whole clinical trial * Other patients who are unsuitable to be included in the trial judged by investigator