Q: There is information about cranberry juice interacting with Coumadin (warfarin), however, I would like to request information about the interaction of grapefruit with Coumadin (warfarin) and if it is contraindicated.
A: While cranberry juice is safe with Coumadin (warfarin), grapefruit and grapefruit juice is most definitely contraindicated (to be avoided) – not only with Coumadin but with many other medications. Cranberries, Grapefruit and Coumadin (warfarin)
