skip to main content

Post-anaphylaxis observation — RACP Paediatrics MCQ

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

EasyEmergencyPost-anaphylaxis observationRACP Paediatrics

A 4-year-old was treated for anaphylaxis to peanut in the ED with IM adrenaline. Symptoms have resolved completely after 2 hours. What is the minimum observation period before discharge?

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

Reveal the answer and explanation

Correct answer: E — Observe for biphasic reaction (4 hours)

After anaphylaxis treated with adrenaline, a minimum observation period of 4 hours is recommended (some guidelines suggest 6-8 hours for severe reactions) to monitor for biphasic reactions, which occur in ~5-20% of cases. The child should be observed in a monitored area with resuscitation equipment available.

Reference: RCH Melbourne – 2023 – Anaphylaxis CPG; ASCIA – 2024 – Anaphylaxis Guidelines