OBJECTIVE: To assess the prevalence of drug use among teenagers. METHODS: A cross-sectional study was carried out in Pelotas, Southern Brazil, in 1998 . An anonymous, self-administered questionnaire was answered by a sample of 2,410 students with ages ranging from 10 to 19 years old, registered in all public and private high schools of the area. The schools were visited up to three times to reach absent students. RESULTS: The attrition rate was 8%. The substances mostly used by the […]