The course focuses on pharmacoepidemiology and its significance in pharmacy practice. It covers the principles of epidemiology as they apply to the study of drug use, including various study designs such as observational studies, experimental studies, case reports, and meta-analyses. Additionally, it addresses data sources, including pharmacy claims data, data validity, and how to define exposure and outcomes. The course also delves into medication safety and pharmacovigilance, emphasizing continuously monitoring unwanted drug effects through post-marketing surveillance. Applications in pharmacy practice, medication adherence, and statistical methods in pharmacopeia are also key topics. An international perspective on global drug surveillance and other methodological issues, such as causality and confounding, are included. Future challenges in the field, along with relevant case studies and examples, will also be explored.