[The role of IPA and dual diagnosis in psychiatry].
The co-occurrence of a psychiatric disorder and a substance use disorder affects many patients in adult psychiatry, with significant clinical and social repercussions. The fragmentation of healthcare systems hinders continuity of care. A survey of 147 nurses at two psychiatric facilities explored existing practices regarding dual diagnosis and defined the roles of advanced practice nurses. These nurses contribute to improving care and reducing disruptions in the care pathway.