This essential content, "Psychopharmacology," is designed to equip students and professors with both scientific and practical foundations regarding the effects of psychotropic medications on the nervous system and human behavior, as well as how to integrate pharmacological knowledge into clinical psychological practice. This content is developed in response to the growing need for psychologists to understand the close relationship between biological processes and psychological disorders. It aims to empower you to: Differentiate between psychological symptoms and the side effects of medications, Understand the mechanisms of action, classifications, and therapeutic uses of psychotropic drugs, Strengthen your ability to collaborate effectively within multidisciplinary medical teams, Develop skills to educate patients and their families about medication use, Gain insight into the ethical and legal aspects surrounding psychotropic medication use in Algeria, Analyze clinical cases from an integrated psychological and pharmacological perspective. It is important to emphasize that this content does not aim to qualify you to prescribe medication. Rather, it prepares you as future psychologists to understand the interaction between pharmacological treatments and psychotherapy — a critical skill that will enhance the quality of care you provide to your patients.