In this module we are going to learn about poisonings, or toxicologic ingestions. There is a whole field of medicine dedicated to the study of how the thing we ingestion, usually accidentally or in an attempt of self-harm, impact our bodies. This field is called toxicology. A poison is any substance that impairs health or causes death. A toxin is a drug or substance that is poisonous to a human, and will cause an adverse event, maybe even death. An antidote is a substance that will neutralize the effect of the poison or toxin. With an understanding of the basic terminology, we can further explore the most common poisons you will encounter in the field, how they affect the body, and how we treat these patients.