skip to main content

Acetaminophen toxicity risk — NDEB AFK MCQ

Instant feedback + full explanation. One question, done properly.

HardBiomedical SciencesAcetaminophen toxicity riskNDEB AFK

A patient with dental pain has been taking acetaminophen 1 g every four hours for two days and drinks alcohol daily. He asks for stronger tablets containing acetaminophen and codeine. What is the most appropriate investigation?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: C — Calculate total acetaminophen exposure from each product

The patient is already at risk of exceeding recommended acetaminophen dosing, and alcohol use increases concern for hepatotoxicity. Calculating total exposure from prescribed and over-the-counter products is essential before adding a combination analgesic. The pearl is to ask specifically about combination cold, flu, and pain products because many contain acetaminophen.

Reference: Canadian dental pharmacology references; NDEB KSAs 2024