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Wrong formulation — GPhC CRA MCQ

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EasyDispensing and SupplyWrong formulationGPhC CRA

A prescription is for modified-release diltiazem 120 mg but the brand is unavailable and another formulation is in stock. What is the most appropriate action?

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Correct answer: E — Check equivalence and consult the prescriber if formulation substitution is uncertain

Modified-release formulations may not be interchangeable and require care before substitution. In this vignette, "Check equivalence and consult the prescriber if formulation substitution is uncertain" is the safest single best answer. The other options are less appropriate because they miss the key clinical risk, conflict with UK medicines guidance, or delay needed review.

Reference: BNF; MEP