Role of Diet

Certain foods and beverages can alter the effects of Coumadin®/warfarin. For this reason, it is important that you pay attention to your eating and drinking habits while you are on this medication. A key consideration regarding your diet while on Coumadin®/warfarin is your Vitamin K intake. The major source of Vitamin K is green, leafy vegetables, such as spinach, broccoli, and kale. Vitamin K can interfere with the blood-thinning effects of Coumadin®/warfarin, so it is very important to maintain a consistent amount of Vitamin K in your diet. Avoid drastic changes in your dietary habits. For instance, eating large amounts of green, leafy vegetables, when you normally do not, can increase the amount of Vitamin K in your system.

Certain beverages can increase the effects of Coumadin®/ warfarin, which may lead to bleeding problems. If you are taking Coumadin®/warfarin, avoid alcohol consumption, cranberry juice, and cranberry products.

Start by talking to your healthcare provider about your eating habits; he or she can help to determine whether any changes need to be made to your diet. You should also consult with your healthcare provider before making any major changes to your diet and before starting any new over-the-counter medicines, vitamins, or herbal supplements. If you are unable to eat for several days or have persistent stomach upset, diarrhea or fever, consult your doctor. He or she may need to adjust your Coumadin®/warfarin dosage.