Ativan, an FDA-approved antianxiety medication, is the brand name for the drug Lorazepam. This oral prescription help to treat anxiety disorders, panic disorder, and phobia with or without agoraphobia. It belongs to the benzodiazepine group of drugs that works by increasing the activity and functions of neurotransmitters known as GABA. Ativan is an oral prescription medication for acute anxiety, phobias, and panic attacks. It belongs to the benzodiazepine group of medications, which act on the brain and nerves to produce a calming effect. Because it is indicated for various conditions, it should only be used under the guidance of your doctor.