Rohypnol, sometimes called ‘roofies’ or ‘rophies’, often called the date drug or date rape drug, causes “Anterograde Amnesia”, an inability in those who have ingested it to remember events that have taken place while under its influence. This effect has been reportedly used to facilitate sexual assault. It is tasteless and colorless and easily dissolved in liquid. It is not approved for use in the United States, but is used elsewhere as a pre-surgery anesthetic and cure for insomnia. Rohypnol belongs to the class of drugs called Benzodiazepines.