In drug delivery, active pharmaceutical ingredient (API) is delivered to the patient through different methods and shapes which are called pharmaceutical dosage forms. Each API has specific physicochemical and pharmaceutical properties which require a suitable pharmaceutical dosage form to be delivered to the body. In this book, the authors present current research from across the globe in the study of drug delivery. Topics discussed include pharmaceutical dosage forms; drug delivery through multifunctional polymeric nanoparticles; targeted liposomal based chemotherapies; the stability of drug delivery PLGA nanoparticles and the influence of particle physicochemical properties on delivery of drugs by dry powder inhalers to the lung.