Intramuscular injection of a Valium (diazepam), normal in about 10 minutes will take effect, the patient will fall asleep, probably can last about 5-8 hours. But people’s response to sedative-hypnotic drugs also have significant individual differences, may be a relatively large weight, strong and strong people are intolerant to Valium, insensitive, may be relatively short sleep time, the shortest possible patient sleep for about half an hour will be awake. If a 10mg diazepam is given intramuscularly to an elderly person or a child, who is lighter and weaker, it may cause the elderly person, and the child to sleep for a day and a night before they wake up, which is obviously different from individual differences, weight, and sensitivity to the drug.