Is it okay to drink grapefruit juice with warfarin?
• A: Grapefruit juice likely has no influence on warfarin (Coumadin) levels and the blood clotting factor. It should, therefore, be fine to drink for patients on warfarin. Dietary consistency is the key to maintaining a sustained, stable response during warfarin therapy. Patients should be aware of vitamin K content in common foods, particularly foods high in vitamin K (green leafy vegetables (broccoli, Brussel sprouts, turnip greens, kale, spinach, beet greens), Cauliflower , legumes, mayonnaise, canola and soybean oils), and should maintain a consistent amount of these foods in their diet. The following foods should be avoided or limited, since they also can effect warfarin therapy: caffeinated beverages (cola, coffee, tea, hot chocolate, chocolate milk).
