Practice question

Answer the question and get instant feedback.

EasyHaematologyWarfarin–macrolide interactionuk-plab-1

A 73-year-old man on Warfarin for atrial fibrillation develops a chest infection. You plan to prescribe an oral antibiotic. Which of the following antibiotics is most likely to increase his INR and bleeding risk and therefore requires careful monitoring or alternative choice?

Practice more on iatroX

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