Certain foods (like green, leafy vegetables) have high amounts of
vitamin K and can decrease your INR. You
do not have to avoid foods high in
vitamin K, but it is very important to try to maintain a consistent diet every week.
Alcohol use also may affect your response to warfarin. Excessive use can lead to a sharp rise in your INR. It is best to avoid alcohol while you are taking warfarin.
I have been on warfarin for 6 months now for DVT, my INR should be between 2-3.