Tips on how to cook for someone who takes coumadin (warfarin)?

Regularly. The important diet tip in patients taking Coumadin (warfarin) is that the diet, including consumption of green vegetables and alcohol has to be constant (the same) from one week to the next. That will prevent swings in INR (test that measures efficacy and toxicity of coumadin) Also be careful with medicines over the counter, vitamins and herbal supplements.