Resources available…Drug addiction and mental health issues such as depression often co-occur.

Brief Description

The term “comorbidity” describes two or more disorders or illnesses occurring in the same person. They can occur at the same time or one after the other. Comorbidity also implies interactions between the illnesses that can worsen the course of both. Learn more

Related Publications

Publication Cover

Comorbidity: Addiction and Other Mental Illnesses

Published December 2008Revised September 2010. Introduces a report that focuses on the topic of comorbid drug use disorders and other mental illnesses, a research priority for NIDA.

Comorbidity: Addiction and Other Mental Disorders

Revised March 2011. Offers basic facts about comorbidity between drug use disorders and other mental illnesses, including why these disorders can co-occur, how common they are, and how they are diagnosed and treated. En Español

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