With Viagra the most famous example, drug repositioning has been growing in importance for pharmaceutical companies seeking to reinvigorate development pipelines. This book provides a broad overview of drug repositioning including the business reasons and unique opportunities and challenges. Its coverage also presents a number of current and emerging technologies that are being applied, along with relevant case studies, as well as neglected diseases to consider. Pharmaceutical researchers will learn how to use drug repositioning techniques to increase the lifespan and applications of their drugs, and also decrease both costs and development time.