This paper presents important findings based on research in the Republic of Croatia on the subject of addiction in adolescence and the possibilities and methods of prevention. Addictions include addiction to tobacco products, alcohol, media, television, internet and drugs, and there are numerous prevention programs in schools, different according to the methodology used, content and effectiveness. The possibility and importance of organizing prevention programs in the extracurricular environment as well as the role of pedagogist as the most broadly profiled professional associate who can influence the policy of the educational institution, as well as outside it, was accentuated. Emphasis is placed on the competencies that the pedagogist must possess in order to implement successful addiction prevention and support families who are already facing this problem. The importance of the advisory work of pedagogists and cooperation with parents for the purpose of better education and early identification of behavior characteristics of children at risk of developing behavioral problems was explained. The focus of the work is on the period of adolescence due to the increased risk of developing addiction and the knowledge that this is the population that needs support, direction, and the development of positive attitudes toward prosocial behavior and negative attitudes toward addictions and antisocial behavior in order to preserve the quality of life and future development.