Ativan is the brand name for lorazepam, a medication in the benzodiazepine class. It is commonly prescribed for its calming effects on the brain and nervous system. Anxiety disorders – Helps manage intense anxiety or panic attacks. Insomnia – Short-term relief of sleep difficulties caused by anxiety. Seizure disorders – Sometimes used as part of emergency treatment for seizures. Preoperative sedation – Helps patients relax before surgery or medical procedures.