Few medications have transformed medicine-and provoked as much global debate-as mifepristone, better known as RU-486 or "the abortion pill." Originally developed in the 1980s, this small tablet has reshaped reproductive healthcare, expanded treatment options for endocrine disorders, and opened new frontiers in medical research. At the same time, it has become a powerful symbol in cultural, religious, and political struggles worldwide.This book provides a comprehensive and accessible guide to mifepristone-covering its history, pharmacology, uses, controversies, and future. With a clear, evidence-based approach, it bridges the gap between scientific research, clinical practice, and the lived experiences of patients.Inside, you will learn: The origin story of mifepristone and its journey from French laboratories to worldwide use.The science behind how it works, from hormone receptor interactions to effects on pregnancy and disease.Its central role in medical abortion, including protocols, safety, and comparisons with surgical procedures.Broader applications, such as the treatment of Cushing's syndrome, uterine fibroids, and investigational roles in oncology and psychiatry.The safety profile, patient outcomes, and recovery process, supported by global clinical data.The cultural, ethical, and political debates that continue to shape access and perception.What the future holds for this drug in research, medicine, and society.Whether you are a healthcare professional, a student of medicine, a patient seeking clarity, or a reader interested in the intersections of science, ethics, and global health, this book provides the knowledge and perspective to understand one of the most important and controversial drugs of our time.