[Dual diagnosis psychosis and substance use disorders in adolescents--part 2].
Despite the high prevalence of comorbid substance use disorders (SUD) in young schizophrenic patients and the association of persisting SUD and poor outcome, there are only few randomized controlled psychological treatment studies in this special dual diagnosis group available. According to therapeutic recommendations, efficient treatment models need to integrate traditional psychiatric therapy and therapy of addiction offered in one setting. Short-term interventions have adapted Motivational interviewing (MI) for dual diagnosis, which has been shown to be effective among other substance abuse disorders. However a recent Cochrane review showed that insufficient evidence exists to show that any psychosocial treatment method for dual diagnosis is superior to others. The aim of this review was to assess the current evidence for the efficacy of psychosocial interventions for reducing substance in young patients with psychosis. Five randomized-controlled studies were identified. This review did not find any specific psychosocial intervention that had been replicated and consistently showed clear advantages over comparison condition for substance-related and other psychiatric outcomes.