Paper I
2024 June (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

Pharmacological basis of Adrenaline in Anaphylactic shock.

Q84 marksShort Answers

Answer

Adrenaline is the drug of choice for anaphylactic shock because its combined receptor actions reverse every major life-threatening component of the reaction simultaneously: alpha-1-mediated vasoconstriction reverses the profound vasodilation and hypotension; beta-1-mediated increased heart rate and contractility support cardiac output; beta-2-mediated bronchodilation relieves the bronchospasm and laryngeal edema that make anaphylaxis fatal; and beta-2 activity also stabilizes mast cells, reducing further release of histamine and other mediators. No other drug addresses all these components at once, which is why adrenaline (IM, anterolateral thigh) is given first, before antihistamines, corticosteroids, or fluids.

Other Years Asked


Revise MBBS
Preview