This encyclopedia covers the definitions, concepts, methods, theories, and application of evidence-based pharmaceutical public health and health services research. It highlights why and how this field has a significant impact on healthcare. The work aims to synthesize baseline knowledge as well as the latest and cutting-edge research-based information. The encyclopedia collates information on public health, health services research, evidence-based pharmacy practice and its impacts on patients, decision-makers and consumers. This reference work discusses all aspects of policy and practice decisions on medicines use, access and pharmacy services by covering broad aspects related to pharmacy practice, public health and health services research. The aim is to develop high-quality content, which will be a must-read and be used as a reference source at all pharmacy and medical schools in the world.