Get 10% Discount Apply Coupon Code "USA10" Diazepam is a benzodiazepine drug that is marketed under the name Valium. Similar to other benzodiazepines, Valium acts on the brain by amplifying the effects of gamma-aminobutyric acid (GABA) neurotransmitter. GABA has inhibitory properties, which means that it lessens brain nerve cell activity, producing a tranquil or soothing sensation.