Get 10% Discount Apply Coupon Code "USA10" Lorazepam is a drug in the benzodiazepine class and is marketed under the name Ativan. The central nervous system depressants known as benzodiazepines function by amplifying the effects of gamma-aminobutyric acid (GABA), a neurotransmitter. GABA has soothing or sedative effects because of its inhibitory actions on the brain.