[Adolescent substance use and family problems].

This study aimed to evaluate the association between substance use (alcohol, tobacco, and illicit drugs) and family problems among 965 adolescents from 50 public schools in two cities in São Paulo State, Brazil, in 2007. The Drug Use Screening Inventory (DUSI) was used for data collection. Use of alcohol, tobacco, and illicit drugs was associated with a negative assessment of the family relationship, lack of monitoring/support, and psychoactive substance use by family members (p < 0.05). Adolescents that reported having used alcohol, tobacco, and illicit drugs had more family problems than those who did not consume any substance (p < 0.001). Adolescents that used alcohol and tobacco (p = 0.028) and illicit drugs (p < 0.001) reported having more family problems than those who used only alcohol. The results highlight the importance of awareness of alcohol and tobacco use by adolescents, since such use was associated with significant family impairments, similar to illicit drug use.