Diabetes is a condition that requires a careful balance between activity and diet. Although medications are often necessary to ensure that the blood sugar remains within a relatively narrow range to prevent complications, the diabetic diet is a critical component of a diabetic management plan. But when a diabetic also needs to take Coumadin, there are some important considerations.
About Coumadin
Coumadin, or warfarin, is commonly called a "blood thinner," although this not accurately describe how the medication works. Coumadin is used to prevent blood clots; if you have had a stroke or heart attack, you may need to take this medication. Diabetes and Coumadin are similar in one way; with each, a component of the blood needs to stay within a certain range. For diabetes, this component is blood sugar and for Coumadin, it is the INR, a measure of how long it takes the blood to clot. This medication slows the clotting of the blood by blocking vitamin K, which is used in the clotting process. Since vitamin K is present in a number of foods, trying to manage diabetes and Coumadin together can present a problem.
The Diabetic Diet
A diabetic diet relies on a careful balance among protein, fats and carbohydrates. According to the MayoClinic.com, a diabetic diet, also known as medical nutrition therapy, or MNT, should emphasize fruits, vegetables and whole grains. It is the focus on vegetables and some fruits that can cause problems with Coumadin because some vegetables contain high amounts of vitamin K and some fruits contain substances that can interfere with the action of Coumadin.
Vegetables and Cranberries
Vitamin K is found in leafy green vegetables, an important part of a diabetic diet. Kale, chard, spinach, and parsley all contain high amounts of vitamin K and can decrease the effectiveness of Coumadin. Other sources of vitamin K include lettuce, broccoli and Brussels sprouts. MayoClinic.com notes that although you should make sure you get enough vitamin K -- the daily recommended intake for adult men is 120 micrograms and for adult women, 90 micrograms -- it's important to be consistent and avoid eating large amounts of these vitamin K-rich foods. Green tea can also interfere with Coumadin. Cranberry products, however, are likely to increase the effect of Coumadin, leading to bleeding problems.
Considerations and Warnings
Diabetes is a complex medical condition and Coumadin is a potentially dangerous medication. For your own safety, follow your diet plan carefully and take your medication as instructed. Talk to a health care professional if you have any questions or concerns.
References
- "Circulation"; A Patient's Guide to Taking Coumadin/Warfarin; Karen Fiumara, Pharm.D.; Samuel Z. Goldhaber, M.D.;2009
- MayoClinic.com; Diabetes Diet: Create Your Healthy-Eating Plan; Mayo Clinic Staff; September 2010
- MayoClinic.com; Warfarin diet: What foods should I avoid?Sheldon G. Sheps, M.D.; May 2010
