Flumazenil is a benzodiazepine antagonist commonly used to treat benzodiazepine overdose. When someone overdoses on benzodiazepines, such as Valium or Xanax, they may experience symptoms like drowsiness, confusion, and slowed breathing. Flumazenil works by binding to the same receptors in the brain as benzodiazepines, effectively blocking their effects and reversing the overdose symptoms. It is administered intravenously and can rapidly reverse the sedative effects of benzodiazepine overdose.