ACE inhibitor potassium — GPhC CRA MCQ

Correct answer: C — Lisinopril with potassium supplementation may cause hyperkalaemia

ACE inhibitors can raise serum potassium and additional potassium can cause dangerous hyperkalaemia. In this scenario, the pharmacist should prioritise safe supply, appropriate counselling and timely referral or clarification where needed. This is the single best answer because the other options would either delay assessment, ignore a clinically significant risk, or create an unsafe legal or professional outcome.

Reference: BNF