Well I looked that shit up...

http://www.psyweb.com/Drughtm/ativan.html

I guess the generic name is Lorazepam.

Lorazepam is an Antianxiety agent ( benzodiazepines,mild tranquilizer ) used for the relief of anxiety, agitation,irritability,to relieve insomnia,to calm people with mania / schizophrenia,and intravenously as a sedative and nervous tension or prior to surgery to relief the anxiety. It has less of an effect on the liver then other benzodiazepines, making it better suited if you are taking birth control pills, anti-abuse drugs,propranolol,ulcer medications,or any other drug that effects the liver. Ativan may also be used to help in the prevention of severe alcohol withdraw symptoms ( Delirium Tremens, DTs ),to treat serial seizures in children by placing it under the tongue, to promote amnesia, or in patients who are undergoing chemotherapy and have severe vomiting.

Turns out to be a Narcotic. So if you can figure out the proper dosages I think you'll probably be able to get "high" on this shit. Seems similar to Vicadin, but that's just my inference.

Be careful though, it is highly addictive.