Paper I
2024 March (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Misoprostol in the treatment of Aspirin induced gastritis

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Answer

Aspirin (and other NSAIDs) cause gastritis/peptic ulceration by inhibiting COX-1-mediated synthesis of protective prostaglandins (PGE2, PGI2) in the gastric mucosa, which normally maintain mucus/bicarbonate secretion and mucosal blood flow. Misoprostol is a synthetic PGE1 analogue that directly replaces this lost prostaglandin-mediated cytoprotection — restoring mucus and bicarbonate secretion and mucosal blood flow — making it a rational, mechanism-based treatment/prophylaxis for aspirin-induced gastric mucosal damage.

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