Part of the “What Do I Do Now: Emergency Medicine” series, Medical Toxicology is an interactive, case-based book that covers content not found in most general specialty textbooks, and gives readers the opportunity to prepare for board certification and recertification, and to gain medical toxicology expertise without the need to perform a deep dive into the literature. The 34 chapters go beyond the basics of common and dangerous toxicities and provide the next step of care for complicated cases, as well as backgrounds to the pathophysiology of severe overdoses. It also addresses multiple overdoses, poisonings, and envenomations and supplements the information and recommendations of a poison center or toxicologist by providing background reasoning when a deep dive into a particular topic is not possible. Readers who are medical students, residents, advanced practice providers, staff physicians in emergency departments, hospitalists, and critical care providers will all find the content in this book stimulating, interactive, and a reliable resource that replicates a curbside consult with an expert.