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Trimethoprim methotrexate infection — GPhC CRA MCQ

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ModerateInfectionsTrimethoprim methotrexate infectionGPhC CRA

A woman taking weekly methotrexate is prescribed trimethoprim for UTI. What is the most important interaction to flag?

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Correct answer: BBone marrow suppression risk

This scenario assesses Trimethoprim methotrexate infection in a UK pharmacy practice context. Trimethoprim increases antifolate toxicity risk with methotrexate and should usually be avoided. The best answer is Bone marrow suppression risk 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