Brief interventions addressing harmful alcohol use in adults admitted to emergency wards have been shown to be effective. The evidence in relation to interventions aimed at adolescents is less conclusive. Young adults share developmental characteristics with adolescents, while receiving care in adult services. We conducted a systematic review to assess the effectiveness of interventions to reduce the recurrence of alcohol-related events and their consequences in young adults (18-24 years) admitted to an emergency ward following alcohol intoxication.