Valium is a brand name for the drug Diazepam, which belongs to the category of drugs called benzodiazepines. It is commonly used to treat anxiety, muscle spasms, and seizures. Buy Valium Online. It works by enhancing the activity of a neurotransmitter in the brain called GABA, which helps calm the nervous system. In addition, Valium has the properties of Anxiolytics, Benzodiazepines, and Skeletal Muscle Relaxants, so it has the potential to manage a host of conditions.