Life cycle of the drug includes more phases. Prior to its use in normal practice each newly invented drug must undergo complex research and particular clinical trials. By registration (marketing authorization) of the drug by the State Institute for Drug Control and by its launching the whole process is not completed. It is necessary to determine price of the medicinal product in the market and/or possible reimbursement from the health insurance. Occurrence of adverse effects and further drug features are monitored in the practice. The first of the planned 4 panels of lectures will be focused on pre-clinical testing, thanks to which we obtain the key information about the active substance prior to its first administration to the human being, and on individual phases of the clinical trial/study of the drug.