Alcohol and cannabis as sleep aids among adolescents and associations with sleep quality and problematic use.

Background: Using alcohol and cannabis as sleep aids is a growing concern among adolescents due to associated health risks. This study examined the prevalence of alcohol and cannabis self-medication practices among adolescents and explored the concurrent (Study I) and prospective (Study II) association with sleep quality and problematic use.

Methods: One cross-sectional and one longitudinal (6-m onth interval) study were conducted.