Inpatients and the majority of outpatients will receive pharmaceutical products as part of their treatment. As a healthcare provider who may administer these products or fill prescriptions, it is crucial for you to have a good foundation of knowledge in pharmacology, toxicology, and the proper handling of prescriptions and controlled substances. This chapter touched on each of these topics to assist you in your duties. However, you should consult the recommended publications, such as the Manual of the Medical Department, Drug Facts and Comparisons, and the Physicians’ Desk Reference, to provide you with the guidance and knowledge you will need to provide the best possible care for your patients.