What is Flunitrazepam (Rohypnol)? Flunitrazepam, sold under the brand name Rohypnol, is a benzodiazepine used primarily for its sedative, hypnotic, and muscle relaxant properties. Developed in the 1960s, it has been used in some countries as a short-term treatment for severe insomnia, preoperative sedation, and for inducing anesthesia. Key Char