Nanosized particles explored for therapeutics and diagnosis-related research areas need the latest updated information for budding researchers as well as academicians. Nanomedicine, nanotheranostics, and nanobiotechnology have been contemporary technological tools for diverse biomedical, pharmaceutical, and diagnostic solutions. The present book is divided into two sections. The first section is dedicated to exclusive book chapters related to nanomedicine such as its history, regulatory aspects, scale-up, and regulatory toxicology. Additionally, this section includes chapters focusing on the application domain of nanomedicine for targeted cancer therapy, rheumatoid arthritis management, psoriasis treatment, ocular delivery, topical applications, oral bioavailability enhancement, and pulmonary delivery. The second section is composed of chapters in the area of nanotheranostics and applications of nanobiotechnology. In brief, the latest topics such as gold nanoparticles in diagnostics and therapy, nanoparticles for siRNA delivery, carbon nanotubes for gene delivery, nanoparticles for vaccine delivery, nanobiotechnology in cell-based nanomedicines, nanotechnology in regenerative medicine, and nanocarriers in delivery of proteins and peptides are complied. KEY FEATURESA total of 26 emerging topics are covered in the book on cutting-edge research areas at the multi-disciplinary level. The chapters focus on fundamentals and applications, making the book attractive for beginners as well as experts. The chapters are written by well-known experts of the field in a simple scientific style with figures, schemes, and illustrations.