Drug Use & Infections in ViEtnam: Mental Health Intervention for INjecting Drug Users

The main objective of this study is to show that People Who Inject Drugs (PWID) suffering initially from a major depressive disorder, a psychotic disorder and/or had a suicide risk and who received a community-based psychiatric intervention improve sustainably their mental health and are comparable after intervention to a population of PWID free of these disorders in terms of: * HIV/HCV exposure * Severity of substance use * Quality of life This is prospective one-year cohort study comparing 200 PWID diagnosed with a psychiatric disorder with 400 controls (200 PWID living with HIV and 200 PWID non-infected with HIV, both free of a diagnosis of depression, psychosis, suicidal risk at cohort initiation). Psychiatric intervention includes free psychiatric consultations and medications (issued on CBO sites), support from CBO members for appointments, information, treatment adherence, contact with families and tracing of those lost to follow-up. Target population and controls will also be proposed linkage to care (HIV, methadone) and harm reduction services.