Get 10% Discount Apply Coupon Code "USA10" Lorazepam, a member of the benzodiazepine class of drugs, is marketed under the name Ativan. Benzodiazepines are depressants of the central nervous system that impact the brain's neurotransmitters, especially gamma-aminobutyric acid (GABA). Neurotransmitter GABA helps lower neuronal excitability in the brain by having inhibitory effects.