The laboratory technologist in me must give you a recommendation. Warfarin therapy is highly dependant on a patient's vitamin K intake. It doesn't mean that you can't eat things high in vitamin K, it just means that you have to be VERY consistent with your diet. When a patient's protimes bounce around a lot, it's usually due to their diet. If Alan is consistent with his diet, his warfarin dose will not have to be adjusted as much. Remember, it IS rat poison after all, and you don't want to mess with that.