Regulatory Affairs deals with the regulation, approval, safety, quality, and efficacy of pharmaceutical products. It includes the role of regulatory authorities and Regulatory Affairs professionals in drug development. Drug approval involves non-clinical studies, pharmacology, toxicology, IND, IB, clinical trials, BE studies, and NDA. Clinical research protocols, biostatistics, data presentation, and clinical study management support successful drug development. Overall, Regulatory Affairs ensures regulatory compliance and safe approval of medicines for the market.