17th May 2025

An 89-year-old female presented with productive cough, shortness of breath, and loss of sense of taste and smell over the past 3 days.

An 89-year-old female presented with productive cough, shortness of breath, and loss of sense of taste and smell over the past 3 days. Chest x-ray showed right lower zone consolidation. She has a past medical history of antiphospholipid syndrome on Warfarin, and recently started taking over-the-counter St John’s Wort. She developed melaena after being started on several medications, oxygen therapy and enteral feed via nasogastric tube. Which medication was the cause of her bleeding?

Select the SINGLE most appropriate option from the list below. Select ONE option only.