Pediatric Drug Development: Concepts and Applications is designed as a reference and textbook and is meant to address the science of differences between the pediatric and adult subject in the development of pharmaceutical products. Considered are the ethics and medical needs of proper understanding the pediatric and adult differences, the business case for proper development of drugs for children, as well as the technical feasibility studies and processes that are necessary for a proper pediatric drug development program. The applications of these approaches will benefit all stakeholders and ultimately not only educate but also provide better and safer drugs for pediatric patients.