NBC Today Show nutrition and health guru Madelyn Fernstrom presents the ultimate guide to food and medicine interaction. While no one wants to take medication to treat diabetes, high blood pressure, heart disease, or other ailments, for millions of people, this is a daily reality. But when it comes to food and medicine interactions, what you don't know can harm your health. Don't Eat This If You're Taking That takes the mystery out of food and medications, providing an easy-to-use guide for anyone taking a medication - short term or long term - that indicates foods to avoid that can interfere with the action of the medication. Readers can easily find a medication, see what foods to avoid, and make some smart swaps.