Overview of Pharmacokinetics By Jennifer Le, PharmD, MAS, BCPS-ID, FIDSA, FCCP, FCSHP, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego Reviewed / Revised Jun 2022 | Modified Sep 2022 View Patient Education Topic Resources Comparison of pharmacokinetic... Formulas Defining Basic Pharmacok... Pharmacokinetics, sometimes described as what the body does to a drug, refers to the movement of drug into, through, and out of the body—the time course of its absorption, bioavailability, distribution, metabolism, and excretion.