Ativan, or lorazepam, is a benzodiazepine prescribed to treat anxiety disorders, insomnia, and sometimes seizures. It works by enhancing the effects of a neurotransmitter called GABA in the brain, producing a calming effect. Ativan is effective for short-term anxiety relief, but prolonged use can lead to tolerance, dependence, and withdrawal symptoms. Side effects may include drowsiness, dizziness, and impaired coordination. Ativan is generally prescribed for shor-term anxiety relief.