This book provides a comprehensive, scholarly, and practical account of delirium that will be of value for all doctors and nurses involved in the care of the elderly. It not only offers a state of the art update on delirium, covering its history, epidemiology, pathophysiology, assessment, diagnosis, causes, prevention, and management, but also presents evidence-based and practical information relevant to daily clinical routine. Owing to the complex multifactorial causes of delirium, different aspects of delirium in the elderly are discussed from a variety of perspectives. The book closes by presenting a series of case vignettes, delirium assessment tools and screening scales, and a list of those drugs highly associated with delirium. Delirium is a cognitive disorder characterized by deficits in attention, arousal, consciousness, memory, orientation, perception, speech, and language. It is a common and serious problem among older persons at every healthcare interface.