Anxiety is a normal emotion that everyone experiences at some point in their lives. It can be caused by a variety of factors, including stress, genetics, and life events. When anxiety becomes excessive and interferes with daily activities, it may be a sign of an anxiety disorder. Ativan (lorazepam) is a prescription medication that is used to treat anxiety disorders. It belongs to a class of medications called benzodiazepines which work by slowing down the nervous system. Ativan is available in tablet and liquid form and is typically taken two or three times a day.