The interview strategy was to obtain information about credibility and utility of sources, effects of different messages content and delivery style, and perceptions of parents and teachers about effectiveness and accuracy of information sources. The main results of the study show that parents and teachers are trusted and credible sources of drug information; that medical, legal and religious persons are credible, but not visible sources; and that media and celebrity fears of parents are ungrounded regarding adolescent perception. Factual information from credible sources focusing on the negative impact of drug use can have a positive affect upon adolescents reported personal use of drugs.