An Introduction To Toxicology Today

: Foreign substances (like drugs or environmental pollutants) that are not naturally found in the body.

: The four critical processes that determine a chemical's fate in the body: A bsorption, D istribution, M etabolism, and E xcretion. An Introduction to Toxicology

Toxicology is the scientific study of the adverse effects that chemical, physical, or biological agents have on living organisms. Often summarized by Paracelsus’s maxim, "the dose makes the poison," the field focuses on how the amount and duration of exposure determine the severity of a toxic response. "the dose makes the poison