Clonazepam, also known as clonidine, belongs to the benzodiazepine class of central nervous system depressants, is a stronger sedative, hypnotic drugs, the role of the main are: 1, anxiolytic, sedative-hypnotic effect; 2, the role of amnesia, mainly can affect the memory of the recent past; 3, the role of anticonvulsant; 4, on the skeletal muscle is a strong relaxation effect. Clonazepam, mainly applied to the sedation before surgery and a variety of insomnia. If used for hypnosis, the main use of the daily bedtime oral 2mg approach; as an anesthetic preparation, the main use of injectable flunitrazepam, for slow injection, the usual amount is 2mg. flunitrazepam main adverse reaction is there will be a mild respiratory depression. In addition, there is a decrease in mental and motor skills on the second morning, but subjectively there is no sensation.