A Randomised Control Trial of a Group Based Intervention and Relapse Prevention Package for Substance Misuse and Psychosis.

INTERVENTION: The intervention consists of an 8 session intergated program for those with co‐occurring psychosis and substance use. It is delevered in a group format for two hours over 8 weeks by qualified and trained mental health professionals. CONDITION: Psychosis Substance Use PRIMARY OUTCOME: Decreased impact of psychopathology. The World health organisation Quality of Life Questionnaire, the Life Skills profile, the Global Assessment of Functioning and the Brief Psychiatric Rating Scale are used for all participants. Decreased substance dependence. The Opiate Treatment Index, the Alcohol Use Disorders Identification test (AUDIT), the Drug Abuse Screening Test (DAST), and the Severity of Substance Use are administered to all participants accross all time points. SECONDARY OUTCOME: Increased community service utilisation. the Diagnostic Interview for Psychosis: Service Utilisation (DIP‐Part 3) is administered to all participants. INCLUSION CRITERIA: Current Diagnosistic and Statistical Manual, Fourth Edition Revised (DSM‐IV) diagnosis of schizophrenia or affective psychosis Concurrent DSM‐IV diagnosis of problematic substance use or dependence Age 18yrs or over Able to converse in English without an interpreter Ability to engage in a one and a half hour group, with a mid‐group break.