I have had fairly stable INR for 3 yrs. I do home testing w/Coaguchek XS and usually test once a week. About 2 weeks ago, on the advice of my cardio, I started the South Beach diet. First two weeks you are very limited. Basicaly, no carbs, no wine, no popcorn. Last Tuesday INR was 2.2. My normal dose is 10.5 daily, so I raised it to 11.00, which usually is all I need to do. Check this morning (after taking 4 doses at that level) and now it is 1.9. I probably will add back the wine and popcorn tonight since I do notice that my digestion has slowed down considerably. Has anyone else done a diet like South Beach with the same results. Should I just add back the foods I was use to having or up my dosage again? I really don't want it lower. My normal range is 2.5 to 3.5. Thanks for any advice.