Mar 10, - Learn about Ativan (Lorazepam) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related. Lorazepam is in a group of drugs called benzodiazepines (ben-zoe-dye-AZE-eh-peens). Lorazepam affects chemicals in the brain that may become unbalanced and cause anxiety. Lorazepam may also be used for other purposes not listed in this medication guide.What is lorazepam (Ativan)? · What should I discuss with · How should I take. Lorazepam is not intended for the primary treatment of psychotic illness or depressive disorders, and should not be used alone to treat depressed patients.