Adverse events in patients caused by medical management are a serious and grossly underreported public health problem. One patient in ten entering hospital will suffer an adverse event of impairment, disability or death. This book is a major comprehensive examination of the incidence and causes of adverse events. Using data obtained from hospitals within the United Kingdom, United States and other developed countries, it examines the risk factors leading to errors, the human and financial costs, and the scope to reduce errors. In particular, it focuses on the need for a critical reappraisal of undergraduate teaching and clinical tuition. All healthcare professionals throughout primary and secondary care, including clinicians, managers and policy makers, and patient and carer groups, can benefit from reading this book. It identifies possible solutions and how adverse events and medication errors can be reduced, resulting in improved patient care.