The book summarizes the importance, synthesis and applications of metal nanoparticles in pharmaceutical sciences, with a focus on ruthenium and platinum nanoparticles. After a brief introduction to the history of metal complexes in medicine and fundamentals of nanotechnology, different methods for preparation of metal nanoparticles are described. An in-depth presentation of current applications as carrier of drugs, anticancer agents, in imaging or pharmaceutical manufacturing rounds of the book. Aimed at further stimulating research in this active field, the book serves as an inevitable reference and guide for academics and professionals working in the field of drug discovery and delivery, nanomaterials, and inorganic chemistry.