skip to main content

Potassium salt substitutes — GPhC CRA MCQ

Instant feedback + full explanation. One question, done properly.

EasyDrug InteractionsPotassium salt substitutesGPhC CRA

A 78-year-old woman takes ramipril and spironolactone for heart failure. She asks to buy a potassium-containing salt substitute after reading about reducing sodium intake. What is the most important interaction to flag?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: D — Potassium salt substitutes can increase hyperkalaemia risk

ACE inhibitors and spironolactone both increase potassium, and potassium-containing salt substitutes can further increase hyperkalaemia risk. Hyperkalaemia can cause dangerous arrhythmias. The patient should be advised against the product and referred for dietary advice suitable for heart failure.

Reference: BNF