The study of biopharmaceutics, pharmacokinetics, and clinical pharmacokinetics has become an essential part of various health education curricula. Briefly, these disciplines provide insight into the selection of the proper dosage form, route of administration, and dosage regimen for a successful drug therapy. Quite often the selection of a drug depends on the factors that affect its delivery to a site of action. Therefore, this book is designed to aid in the study of principles needed to initiate and successfully terminate drug therapy once a diagnosis has been made. This book specifically addresses undergraduate students of pharmacy and other health-related fields.