This textbook is written in accordance with the program approved by the Ministry of Health of the Russian Federation and is intended for students of pharmaceutical universities and faculties. The first part of the textbook focuses on the general principles of pharmacokinetics and pharmacodynamics, as well as discussing issues related to the side effects and toxicity of medicinal substances. The second part delves into specialized pharmacology, organized into chapters based on the accepted classification of pharmaceuticals. Most chapters provide concise information on the pathogenesis of diseases for which specific groups of medications are used. The section on "General Prescription" outlines the rules for writing prescriptions for various forms of medication.