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 and is used to treat anxiety disorders. Learn about side effects, interactions and indications. Lorazepam (Ativan) is a Schedule IV controlled substance, which means that is has a relative to the drugs and other substances in Schedule III, e.g., anabolic ste Eventually the.5 will not work and the dose will be increased or tolerance.