DrugFacts: Comorbidity: Substance Use Disorders and Other Mental Illnesses.

Read each of the following sections: 'What Is Co-morbidity?', 'Is Drug Addiction a Mental Illness?', 'How Common Are Comorbid Drug Addiction and Other Mental Illnesses?', and the first 3 paragraphs of 'Why Do These Disorders Often Co-occur?' (7 minutes)

NIH-NIDA - 2018