Flumazenil is used for reversal of which class of drugs?

• A. Opioids
• B. Sedative-hypnotics
• C. Benzodiazepines
• D. Antipsychotics

Answer: (C)

Flumazenil specifically targets benzodiazepines. It works as a competitive antagonist at the benzodiazepine binding site on the GABA-A receptor, so it blocks the enhancing effect those drugs have on GABAergic inhibition. By doing this, it reverses the sedation, hypnosis, and potential respiratory depression caused by benzodiazepines after overdose or excessive sedation. It’s not a reversal agent for opioids—those effects are reversed with naloxone—or for other non-benzodiazepine sedatives, which act through different mechanisms. A note of caution: in people who are benzodiazepine-dependent, abrupt reversal can trigger withdrawal or seizures, so it must be used with careful monitoring.