Which of the following is described as a competitive benzodiazepine receptor antagonist?A.MidazolamB.FlumazenilC.KetamineD.Chlordiazepoxide

Identification of the Competitive Benzodiazepine Receptor Antagonist

1. Understanding Benzodiazepine Receptor Antagonists: Benzodiazepine receptor antagonists are substances that counteract the effects of benzodiazepines, often used in cases of overdose or to reverse sedation.

2. Evaluating Each Option:

   • A. Midazolam: This is a benzodiazepine used for sedation and anxiety but not an antagonist.
   • B. Flumazenil: This is a specific antagonist for benzodiazepine receptors, used to reverse the effects of benzodiazepines like midazolam and diazepam.
   • C. Ketamine: This is an NMDA receptor antagonist, not related to benzodiazepine receptors.
   • D. Chlordiazepoxide: This is an anxiolytic medication that belongs to the benzodiazepine class and acts as a sedative, not an antagonist.

Final Answer

The correct answer is B. Flumazenil.