Fungal infections: onychomycosis: practice question

A Dermatology 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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Dermatology · Fungal infections: onychomycosis

Sample item

What is the usual continuous oral terbinafine regimen for toenail onychomycosis in an adult?

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

The answer and the reasoning

B. 250 mg daily for 12 weeks

Terbinafine 250 mg daily for 6 weeks treats fingernails and 12 weeks treats toenails. Liver function should be checked in patients with hepatic disease or if treatment is prolonged.

Option by option

  • A. 100 mg daily for 4 days

    Four days is not an established regimen.

  • B. 250 mg daily for 12 weeks (correct)

    Correct. Toenails need 12 weeks of terbinafine.

  • C. 500 mg daily for 6 months

    Six months at 500 mg is above the standard dose.

  • D. 250 mg daily for 1 week

    One week is too short for nail growth.

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 Dermatology question

What is the answer to this Dermatology question?

The best answer is B, 250 mg daily for 12 weeks. Terbinafine 250 mg daily for 6 weeks treats fingernails and 12 weeks treats toenails.

Why is "100 mg daily for 4 days" not the answer?

Four days is not an established regimen.

Why is "500 mg daily for 6 months" not the answer?

Six months at 500 mg is above the standard dose.

Why is "250 mg daily for 1 week" not the answer?

One week is too short for nail growth.

What concept does this question test?

It tests Fungal infections: onychomycosis in Dermatology. Liver function should be checked in patients with hepatic disease or if treatment is prolonged.

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 Fungal infections: onychomycosis?

Learn each condition by its primary lesion, site and signature sign. Then use the flashcards and the other Dermatology 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.