Ativan: Lorazepam belongs to the class of medications called benzodiazepines. Lorazepam is used for the short-term relief of the symptoms of excessive anxiety. Consumer information about the medication LORAZEPAM - ORAL (Ativan), includes side effects, drug interactions, recommended dosages, and storage. Mar 10, - Learn about Ativan (Lorazepam) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related.