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

Question

Comment on the interaction between itraconazole and omeprazole.

Q111 marksShort Answers

Answer

Itraconazole requires an acidic gastric environment for adequate dissolution and absorption. Omeprazole, a proton pump inhibitor, raises gastric pH by suppressing acid secretion, which significantly reduces the oral absorption and bioavailability of itraconazole — potentially leading to therapeutic failure of the antifungal. Co-administration should be avoided, or itraconazole should be given with an acidic beverage/well-separated in timing if unavoidable.

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