Flumazenil reverses the effects of benzodiazepine (BENZ-oh-dye-AYZ-e-peen) sedatives such as Valium, Versed, Xanax, Tranxene, and others. Benzodiazepines are sometimes used as sedatives before surgery or other medical procedures. Flumazenil is used to reverse benzodiazepine sedation to help you wake up after your medical procedure. Flumazenil is also used to treat benzodiazepine overdose in adults.