What is Valium (Diazepam) Diazepam is a generic medicine and classified as a benzodiazepine. Benzodiazepines belong to the group of drugs called central nervous system depressants, which are medications that slow down the nervous system. This generic drug is available for medical use under the brand name Valium. Though selling or giving diazepam is going against the law but, with your doctor’s prescription, you can buy Valium online. Valium is a medicine widely used for a variety of nervous s...