The document discusses the integrated care model for treating substance use disorders (SUDs) in individuals with psychiatric illnesses, highlighting the prevalence of co-morbidities and the need for comprehensive treatment approaches. It outlines the history and definitions of dual diagnoses, the neurobiology of addiction and withdrawal, and various evidence-based treatment strategies, emphasizing the importance of individualized wellness plans. The integrated model promotes simultaneous treatment of mental health and substance abuse services to optimize recovery and address the complexities of co-occurring disorders.