Moving beyond simple technologies that merely incorporated drugs into erodible or inert polymers as release platforms, 80 papers review recent developments in design and manufacturing techniques related to modified-release drug delivery systems. With the exception of a final section addressing regulatory issues, each of the ten sections of this volume is dedicated to particular routes for drug delivery and opens with an overview of the anatomical, physiological, and pharmaceutical basics of each route before moving on to coverage of specific technologies. Delivery routes covered include oral, colonic, ocular, oral mucosal, dermal and transdermal, injections and implants, nasal, vaginal, and pulmonary.