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Levothyroxine calcium — GPhC CRA MCQ

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HardDrug InteractionsLevothyroxine calciumGPhC CRA

A patient plans to take levothyroxine and calcium carbonate together with breakfast. What is the most important interaction to flag?

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Correct answer: EReduced levothyroxine absorption

This scenario assesses Levothyroxine calcium in a UK pharmacy practice context. Calcium salts bind levothyroxine and reduce absorption. The best answer is Reduced levothyroxine absorption because it addresses the principal clinical, legal or safety issue before routine supply. The other options are less appropriate because they either miss the key risk, delay necessary review, or would not meet expected BNF, NICE, MEP, MHRA or GPhC practice standards.

Reference: BNF