Alteration in pharmacotherapy is the most common medical intervention in hospitalized patients. This guide covers the most commonly used medications on inpatient medical and surgical services. In addition to covering the essential pharmacology for each medication, this resource provides clinical pearls and links to important studies that define the clinical utility of each drug. The text has been designed for use by medical students, residents, fellows, nurses, nurse practitioners, and physician assistants. The textbook’s user-friendly format allows for it to be easily incorporated into the work of first-line care providers, improving knowledge and patient safety in the process.