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Comorbidity: Addiction and Other Mental Illnesses

What is comorbidity?

When two disorders or illnesses occur in the same person, simultaneously or sequentially, they are described as comorbid. Comorbidity also implies interactions between the illnesses that affect the course and prognosis of both.

This page was last updated September 2010

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NIDA. (2010, September 1). Comorbidity: Addiction and Other Mental Illnesses. Retrieved from https://www.drugabuse.gov/publications/research-reports/comorbidity-addiction-other-mental-illnesses

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NIDA Notes: The Latest in Drug Abuse Research

​Research Reports

This series of reports simplifies the science of research findings for the educated lay public, legislators, educational groups, and practitioners. The series reports on research findings of national interest.

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