Labour: tocolytics: practice question

A OBG 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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OBG · Labour: tocolytics

Sample item

Which tocolytic acts as an oxytocin receptor antagonist?

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

The answer and the reasoning

A. Atosiban

Atosiban competitively blocks oxytocin and vasopressin V1a receptors in the myometrium and has few maternal side effects. Nifedipine is a calcium channel blocker, ritodrine is a beta-2 agonist, and indomethacin is a prostaglandin synthetase inhibitor.

Option by option

  • A. Atosiban (correct)

    Correct. Atosiban is an oxytocin receptor antagonist.

  • B. Ritodrine

    Ritodrine is a beta-agonist.

  • C. Nifedipine

    Nifedipine blocks calcium channels.

  • D. Indomethacin

    Indomethacin inhibits prostaglandin synthesis.

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.

More OBG questions

Questions about this OBG question

What is the answer to this OBG question?

The best answer is A, Atosiban. Atosiban competitively blocks oxytocin and vasopressin V1a receptors in the myometrium and has few maternal side effects.

Why is "Ritodrine" not the answer?

Ritodrine is a beta-agonist.

Why is "Nifedipine" not the answer?

Nifedipine blocks calcium channels.

Why is "Indomethacin" not the answer?

Indomethacin inhibits prostaglandin synthesis.

What concept does this question test?

It tests Labour: tocolytics in OBG. Nifedipine is a calcium channel blocker, ritodrine is a beta-2 agonist, and indomethacin is a prostaglandin synthetase inhibitor.

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 Labour: tocolytics?

Learn management algorithms as steps: PPH, eclampsia, ectopic pregnancy. Then use the flashcards and the other OBG 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.