Is grapefruit safe for those taking Coumadin (warfarin)?

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.

The Health meets Food Team Says...

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.

Here's information on Coumadin and cranberry juice:

Older information: Should you avoid cranberry juice while on Coumadin (warfarin)?

Most recent information: Should you avoid cranberries and cranberry juice while on Coumadin (warfarin) [Updated!]

And information on grapefruit:

Does grapefruit really interact with medications?

A Pharmacist's take on grapefruit and its interaction with medications

Thanks for writing.

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