Muscle relaxants: mivacurium: 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.

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Anaesthesia · Muscle relaxants: mivacurium

Sample item

Which non-depolarising relaxant is metabolised by plasma cholinesterase?

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

The answer and the reasoning

C. Mivacurium

Mivacurium is hydrolysed by plasma cholinesterase, so block is prolonged in cholinesterase deficiency. It can release histamine.

Option by option

  • A. Pancuronium

    Pancuronium is excreted mostly by the kidney.

  • B. Vecuronium

    Vecuronium is eliminated by liver and bile.

  • C. Mivacurium (correct)

    Correct. Mivacurium is a plasma cholinesterase substrate.

  • D. Rocuronium

    Rocuronium is excreted by the liver.

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.

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Questions about this Anaesthesia question

What is the answer to this Anaesthesia question?

The best answer is C, Mivacurium. Mivacurium is hydrolysed by plasma cholinesterase, so block is prolonged in cholinesterase deficiency.

Why is "Pancuronium" not the answer?

Pancuronium is excreted mostly by the kidney.

Why is "Vecuronium" not the answer?

Vecuronium is eliminated by liver and bile.

Why is "Rocuronium" not the answer?

Rocuronium is excreted by the liver.

What concept does this question test?

It tests Muscle relaxants: mivacurium in Anaesthesia. It can release histamine.

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 Muscle relaxants: mivacurium?

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.