Book excerpt: This is the perfect book for clinical rounds and internships! Food can significantly alter the concentrations of some medications. Alternatively, medications can contribute to nutritional deficiencies and other dietary complications. In this reference book, we lay out over 500 of the most commonly used medications and how they impact diet or how diet can alter the effects of drugs. This guide is designed to highlight important food and drug interactions with the most commonly used medications in clinical practice. In addition to highlighting potential food medication interactions, we have also laid out common adverse effects, indications, clinical pearls, mechanisms of action, and monitoring parameters that are critical for each medication. This is meant to be a quick reference for healthcare professionals and students who work in healthcare as dietitians, pharmacists, nurses, nurse practitioners, physicians, physician assistants, and others.