Paper I
2023 January (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

Adrenaline/Noradrenaline in Anaphylactic shock

Q130.2 marksShort Answers

Answer

Adrenaline is the appropriate choice — its combined alpha-1 (reverses hypotension/vasodilation), beta-1 (supports cardiac output), and beta-2 (relieves bronchospasm and reduces further mediator release) actions address every major life-threatening component of anaphylaxis simultaneously. Noradrenaline has negligible beta-2 activity, so it would not relieve the bronchospasm and laryngeal edema that make anaphylaxis life-threatening, despite being an effective vasopressor for the hypotension component alone.

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