Intravenous and inhalational agents: re-sedation after flumazenil: practice question

A Anaesthesia question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

Try it

Anaesthesia · Intravenous and inhalational agents: re-sedation after flumazenil

Sample item

Flumazenil 0.2 mg wakes a patient who received intravenous diazepam for a procedure. Forty minutes later he is drowsy again with slow respiration. What is the explanation?

AHypercapnia from the flumazenil itself has caused narcosisBFlumazenil has a shorter duration than diazepam and its active metabolitesCFlumazenil triggers release of endogenous benzodiazepine-like compoundsDResidual neuromuscular block has become apparent

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. Flumazenil has a shorter duration than diazepam and its active metabolites

Flumazenil is a short-acting competitive antagonist, with a half-life of about an hour, while diazepam and desmethyldiazepam act for many hours. When flumazenil wears off the agonist effects return, so patients need observation and sometimes repeat dosing or an infusion.

Option by option

A. Hypercapnia from the flumazenil itself has caused narcosis
Flumazenil does not itself produce hypercapnic narcosis.
B. Flumazenil has a shorter duration than diazepam and its active metabolites (correct)
Correct. The antagonist is cleared faster than the long-acting agonist, so sedation returns.
C. Flumazenil triggers release of endogenous benzodiazepine-like compounds
Flumazenil does not cause release of endogenous sedating compounds.
D. Residual neuromuscular block has become apparent
Neuromuscular block is not part of a benzodiazepine sedation and does not explain the drowsiness.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Anaesthesia question

What is the answer to this Anaesthesia question?

The best answer is B, Flumazenil has a shorter duration than diazepam and its active metabolites. Flumazenil is a short-acting competitive antagonist, with a half-life of about an hour, while diazepam and desmethyldiazepam act for many hours.

Why is "Hypercapnia from the flumazenil itself has caused narcosis" not the answer?

Flumazenil does not itself produce hypercapnic narcosis.

Why is "Flumazenil triggers release of endogenous benzodiazepine-like compoun…" not the answer?

Flumazenil does not cause release of endogenous sedating compounds.

Why is "Residual neuromuscular block has become apparent" not the answer?

Neuromuscular block is not part of a benzodiazepine sedation and does not explain the drowsiness.

What concept does this question test?

It tests Intravenous and inhalational agents: re-sedation after flumazenil in Anaesthesia. When flumazenil wears off the agonist effects return, so patients need observation and sometimes repeat dosing or an infusion.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Intravenous and inhalational agents: re-sedation after flumazenil?

Make a table of each agent, its key advantage and its main side effect. Then use the flashcards and the other Anaesthesia questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.