Due to the huge number of new drug innovative that are recently in the market; it is highly demanded to have a comparative risk/benefit evaluation. Assessment of safety and risk management of different drugs is done under observational epidemiological studies. This is usually done after randomized clinical trials. The course will cover the main key issues in pharmacoepidemiologic and students will learn how to deal with the problems in the real practice of pharmacoepidemiology. The course will mainly have the following topics: Study Design; Confounding and biases; Drug safety research; Drug Safety and Risk Management; Overview of Pharmacoepidemiological databases; case studies & public.