Colestyramine levothyroxine — GPhC CRA MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: B — Colestyramine can bind levothyroxine and reduce absorption
Colestyramine binds medicines in the gut and can reduce absorption. 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