This volume features a collection of published articles that appeared in 'Australian Prescriber' on the subject of pharacokinetics. It aims to make the subject more accessible to its non-specialist audience, adopting a physiological approach with direct application of the concepts to practical issues related to drug therapy. This revised edition includes a new chapter on population pharmacokinetics, to reflect developments in the field. It also features self-assessment questions in each chapter and equations to explain physiological factors underlying important pharmacokinetics processes.