What might be a first indication of substance use disorder in adolescents?

A decline in academic performance is often one of the earliest signs of substance use disorder in adolescents. This can manifest as a drop in grades, lack of interest in school activities, or difficulty concentrating and completing assignments. Adolescents may prioritize substance use over their educational responsibilities, leading to disengagement from academic pursuits.

While increased physical activity might suggest a positive behavior or interest in sports, it does not inherently indicate substance use. Similarly, weight gain could result from a variety of factors unrelated to substance use, such as lifestyle changes or medical conditions. A desire for solitude can be common in many adolescents during their developmental stage; however, when combined with other symptoms, it may indicate broader issues but is not as definitive as academic decline. Thus, academic performance tends to be a more direct and observable indicator of potential substance use issues in this age group.