Paper I
2015 September (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Rationale for use of prostaglandin in acid peptic disease

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Answer

Prostaglandins (PGE2, PGI2) normally have a cytoprotective role in the gastric mucosa — they stimulate mucus and bicarbonate secretion, maintain mucosal blood flow, and inhibit acid secretion. In acid-peptic disease, particularly NSAID-induced ulcers (where NSAIDs deplete protective prostaglandins by inhibiting COX-1), a synthetic PGE1 analogue, Misoprostol, is used to restore this protective/anti-secretory action, promoting ulcer healing and preventing NSAID-induced gastric damage.

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