Ativan is a standard anti-anxiety medication that is part of a class of substances called benzodiazepines. These psychoactive drugs are used primarily in the treatment of anxiety but may also be used to treat panic disorders, seizures, insomnia and trouble sleeping. In some cases, benzodiazepines can also be used for anesthesia, sedation before surgery or medical procedures, muscle relaxation, withdrawal from alcohol and drugs, nausea, vomiting and depression.