This book discusses the stages involved in pharmaceutical product development including the importance, requirement, and effect of each stage and process. It also covers prototype development for pharmaceutical formulations, scale-up studies, optimization, testing, packaging, and commercialization of different dosage forms for pharmaceutical products like tablets, suspensions, emulsions, coating, inhalational products, sterile products, and herbal formulations. The book also presents advancements in tablet production and tablet coating, including materials, material handling, granulation and granulation technologies, process automation, processing problems in tablet production and troubleshooting, advances in equipment for coating and coating materials. Further, the chapter explores the advances in the formulation and development of aerosols, nebulizers, inhalers, metered Dose Inhalers (MDI), and dry powder Inhalers (DPIs). Towards the end, the book examines the challenges, formulation development, testing, stability, and regulatory guidelines in the development of herbal formulations. This book provides a valuable source of information for the researcher, scientists, students, and people working in the area mainly focused on the challenges in pharmaceutical product development.