Rohypnol
Rohypnol is a "recreational" drug that is used by some persons for relaxation and a "high". Unfortunately, it is also known as a "date rape drug" because some other individuals may slip it into someone else's drink for the purpose of placing them into a stupor in which it is very easy for the perpetrator to initiate sexual activity. An additional "benefit" (at least to the perpetrator) is that their victim is unlikely to a have a conscious memory of the event. This is why girls and women are warned to never accept a drink from a stranger and to always watch their drink, to save it from being laced with illegal substances. See also Date Rape Drug.