I have an INR machine at home. I had not eaten cherries while I have been on Coumadin until recently they were on sale at the store where I shop. Two weeks ago my level was 1.9. my doctor increased my dose to 7 mg 3 X week and 6 mg the other four days. Last Monday it was 2.8. The doctor said continue the same dose. This morning it is 3.1 but I have not eaten cherries during the past week.