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Loop diuretic electrolyte effects — GPhC CRA MCQ

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ModerateCardiovascular TherapeuticsLoop diuretic electrolyte effectsGPhC CRA

A 74-year-old man has started furosemide 40mg each morning for heart failure symptoms. He also takes ramipril and metformin. The GP asks what should be checked after starting treatment. What monitoring is required?

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Correct answer: A — Renal function and electrolytes

Loop diuretics can affect renal function and electrolytes, particularly potassium and sodium. Heart failure patients often take other medicines that also affect renal function, so monitoring is important after initiation or dose changes. Digoxin levels are needed if the patient takes digoxin or toxicity is suspected. INR and peak flow are not routine monitoring for furosemide.

Reference: BNF