Pharmacology C.N.S 2540e24f Flumazenil antagonize the effect of which drug: A Ketamine B Fentanyl C Midazolam D Propofol High-Yield Explanation Ans. C. MidazolamFlumazenil is competitive antagonist of benzodiazepine receptor and is used for respiratory depression due benzodiazepines (midazolam).