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Alendronate and calcium timing — GPhC CRA MCQ

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HardDrug InteractionsAlendronate and calcium timingGPhC CRA

A patient takes alendronic acid and calcium carbonate together first thing in the morning because they are for bones. They ask if this is correct. What is the most important interaction to flag?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: A — Reduced alendronate absorption

Calcium can impair alendronate absorption if taken together. The best answer addresses the key safety, legal or pharmaceutical care issue in the vignette. The other options would either delay appropriate care, create a new risk, or fail to resolve the issue. This is consistent with the cited UK reference for safe pharmacy practice.

Reference: BNF