As I have mentioned a few times, I take 5MG of Warfarin (Generic version of Coumadin) daily -- have been for 6-7 years now. I have my Prothombine Time checked every 8 weeks and have not had any wide variations, certainly none outside of "normal" range. Of course, my diet doesn't vary much either.
I don't have any other choice but to continue taking an anti-coagulate for the rest of my life -- Atrial Fibrillation. Nevertheless, I have some concerns with the long-term effects of Warfarin/Coumadin use. So I am particularly interested in this:
Dabigatran - A Coumadin Substitute for Atrial Fibrillation?
Let me google that for you+
Perhaps, this is something you can get your PCP's advice on.