We don't know, as far as i can tell it has not been studied.
I do know that smoking
of any type, increases the risk of vascular events of the type we are generally trying to prevent with anti-coagulation with drugs like coumadin
. But as for directly affecting inr
, we don't really know. Coumadin/warfarin is a dangerous drug with a narrow therapeutic window. I would advise caution.
Answer assisted by Mike Moore, Medical Student