16th May 2025

A 72-year-old lady who is on long term warfarin therapy is admitted with a second tonic clonic seizure.

A 72-year-old lady who is on long term warfarin therapy is admitted with a second tonic clonic seizure. Her drug history includes aspirin, atorvastatin, bisoprolol, and ramipril. On examination her BP is 132/82, heart rate 72/min. Her bloods are unremarkable except an elevated random blood glucose of 12.1. Which of the following antiepileptic medications is most likely to interfere with her warfarin?

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