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Anaphylaxis — MCCQE Part 1 MCQ

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EasyAllergic Reactions and AtopyAnaphylaxisMCCQE Part 1

A 12-year-old boy develops generalized urticaria, wheeze and dizziness 5 minutes after eating a cookie containing peanuts. Blood pressure is 86/48 mmHg and oxygen saturation is 91%. What is the most appropriate next step in management?

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

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Correct answer: C — Give intramuscular epinephrine into the lateral thigh

Airway, breathing and circulatory involvement after allergen exposure indicate anaphylaxis; intramuscular epinephrine is first-line. Antihistamines and steroids are adjuncts and should not delay epinephrine. Tryptase is not required before treatment.

Reference: Canadian Paediatric Society anaphylaxis guidance; NACI