A 68-year-old with heart failure (EF 30%) and a serum potassium of 5.6 mEq/L is on lisinopril and spironolactone. Which intervention is most appropriate?
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A
Add amlodipine for additional benefit
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B
Hold the spironolactone and recheck potassium
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C
Increase the lisinopril dose
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D
Start a potassium supplement