A 50-year-old man on Warfarin for atrial fibrillation develops a lower respiratory tract infection. Which commonly used antibiotic is most likely to s...

Question

A 50-year-old man on Warfarin for atrial fibrillation develops a lower respiratory tract infection. Which commonly used antibiotic is most likely to significantly increase his INR and bleeding risk?

Accepted Answer

Clarithromycin

Answer

Doxycycline

Answer

Amoxicillin

Answer

Nitrofurantoin

Answer

Cefalexin

uk-plab-1 MCQ (SBA): Warfarin–macrolide interaction

A 50-year-old man on Warfarin for atrial fibrillation develops a lower respiratory tract infection. Which commonly used antibiotic is most likely to significantly increase his INR and bleeding risk?