Nanomaterials, with their unique size-dependent physical and chemical properties, have shown promising advantages as drug and gene delivery vehicles, ultra-sensitive intracellular detectors and novel therapeutic drugs. Nanopharmaceutics is one of the disciplines that will benefit the most from this technology.Nanotechnology will have a revolutionary impact on cancer diagnosis and therapy due to the exceptional characteristics of nanopharmaceutics.This book provides an overview of some tools, methods, and materials of nanotechnology that offer potential applications in pharmaceutics, followed by a series of examples showing applications that are already in development. It may very well inspire researchers to develop a new generation of pharmaceutics with inventive non-traditional approach and employ nanoscale science for the benefit of the patient.