Substance use: phencyclidine: practice question

A Psychiatry 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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Psychiatry · Substance use: phencyclidine

Sample item

An aggressive agitated man has vertical and horizontal nystagmus, a blank stare, analgesia and hypertension after using a dissociative drug. This is typical of intoxication with:

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

The answer and the reasoning

D. Phencyclidine (PCP)

PCP, an NMDA antagonist, causes violent behaviour, vertical or horizontal nystagmus, analgesia, hypertension and psychosis. Treatment is a quiet environment and benzodiazepines.

Option by option

  • A. LSD

    LSD causes visual distortions without nystagmus and analgesia.

  • B. Heroin

    Heroin produces miosis and sedation.

  • C. Cannabis

    Cannabis produces conjunctival injection.

  • D. Phencyclidine (PCP) (correct)

    Correct. Nystagmus with violence and analgesia suggests PCP.

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 Psychiatry question

What is the answer to this Psychiatry question?

The best answer is D, Phencyclidine (PCP). PCP, an NMDA antagonist, causes violent behaviour, vertical or horizontal nystagmus, analgesia, hypertension and psychosis.

Why is "LSD" not the answer?

LSD causes visual distortions without nystagmus and analgesia.

Why is "Heroin" not the answer?

Heroin produces miosis and sedation.

Why is "Cannabis" not the answer?

Cannabis produces conjunctival injection.

What concept does this question test?

It tests Substance use: phencyclidine in Psychiatry. Treatment is a quiet environment and benzodiazepines.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. 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 Substance use: phencyclidine?

Learn each diagnosis by its core features and its first-line treatment. Then use the flashcards and the other Psychiatry 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.