Ativan (Lorazepam) is an anti-anxiety agent (benzodiazepines,mild tranquilizer) used for the relief of anxiety, agitation and irritability, to relieve insomnia, to calm people with mania / schizophrenia and intravenously as a sedative and for nervous tension or to relieve anxiety prior to surgery. http://www.vegas-webspace.com/Hiruin/ativan.html