Rohypnol: The trade name for flunitrazepam, which has been abused as a 'date rape' drug. Rohypnol produces sedative-hypnotic effects including muscle relaxation and amnesia. It can produces physical and psychological dependence and can be lethal when mixed with alcohol and/or other depressants. It is not approved for use in the US and its importati... Found on http://www.medterms.com/script/main/art.asp?articlekey=23139