Introduction: Biopharmaceutics and Pharmacokinetics

Biopharmaceutics and Pharmacokinetics are pharmaceutical disciplines that are useful for improving the outcome of drug therapies, assisting drug product development, and establishing pharmacokinetics-pharmacodynamics models and in vitro-in vivo correlations. Here, we introduce some essential lexicons that will be used throughout this volume and discuss the relationship between drug exposure and the pharmacological response to drug therapy in the framework of the free drug hypothesis.