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Anaphylaxis — MCCQE Part 1 MCQ

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EasyAcute CareAnaphylaxisMCCQE Part 1

A 9-year-old child develops wheeze, diffuse urticaria, lip swelling, and dizziness minutes after eating a cookie at school. BP is 82/48 mmHg and oxygen saturation is 94%. What is the most appropriate next step in management?

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Correct answer: B — Give intramuscular epinephrine into the mid-anterolateral thigh

Multisystem allergic reaction with hypotension is anaphylaxis; intramuscular epinephrine is first-line and should not be delayed. Antihistamines and steroids are adjuncts and do not treat shock or airway oedema promptly. Salbutamol helps bronchospasm but is not definitive. Tryptase can support later evaluation but treatment is clinical.

Reference: Canadian Society of Allergy and Clinical Immunology anaphylaxis guidance