The term "benzodiazepines" reflects chemical affiliation to drugs with the 5-aryl-1,4-benzodiazepine structure, which appeared as a result of the combination of the benzene ring in the seven-membered diazepine ring. In medicine, various benzodiazepines have found wide application. Well-studied and most widely used for the needs of anesthesiology in all countries are three medications: midazolam, diazepam and lorazepam.