The comorbidity of substance use and mental health disorders implies interactions between the illnesses that can worsen the course of both. Many people who have a substance use disorder also develop other mental illnesses, just as many people who are diagnosed with mental illness are often diagnosed with a substance use disorder. Substance use disorders and mental illnesses have many of the same risk factors. Additionally, having a mental illness may predispose someone to develop a substance use disorder and vice versa. The Sunrise House offers a comprehensive approach that identifies, evaluates, and addresses both substance use and mental health disorders, focusing on both issues together, rather than one or the other.