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Eplerenone safety — GPhC CRA MCQ

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HardCardiovascular TherapeuticsEplerenone safetyGPhC CRA

A patient is due to start eplerenone 25 mg daily after myocardial infarction. Before the first dose, potassium is 5.2 mmol/L and CrCl is 54 mL/min; ramipril is already prescribed. What should the pharmacist recommend?

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Correct answer: DDefer initiation and query the prescription; the pre-dose threshold is exceeded

Eplerenone must not be started when serum potassium is above 5.0 mmol/L. The ACE inhibitor adds further hyperkalaemia risk, although ACE inhibitor plus eplerenone is not itself the prohibited triple combination of ACE inhibitor, ARB and eplerenone. The pharmacist should stop initiation and contact the prescriber; after a safe start, potassium is checked within one week and at one month.

Reference: Eplerenone SmPC: https://www.medicines.org.uk/emc/product/3665/smpc