The total sample of 120 will be broken down to 1.) 60 patients from Railway Clinical Hospital; and 2.) 60 students from Kiev National Medical University. Participants will be stratified by recruitment site and randomized to condition: BMI and control, with follow-up assessment at 3 months. In addition to being the first of study to evaluate the efficacy of BMI on substance use problems among youth in Ukraine, this study will examine BMI intervention processes in relation to alcohol and other drug outcomes. Findings will inform research and clinical practice to enhance early identification and prevention of problematic alcohol use trajectories among emerging adults