This book compiles contributions of prominent experts and researchers in the multidisciplinary arena of novel drug delivery systems. It gives insights into the ongoing and recent potentialities of various drug delivery systems. Emergence of analytical approaches and capabilities to determine particle sizes in nanometer ranges has focused interest towards nanoparticles for more effective methods of drug delivery. The book focuses on various aspects of drug delivery systems such as developments in the optimization, design and adaptation of gene delivery systems for treatment of infectious, genetic, cardiovascular diseases and cancer. The book assesses and reviews procedures under two sections: Powder Technology in Drug Delivery and Nano carriers in Drug Delivery.