Co-Occurring Disorders and Mental Health Issues in Addiction


Dual Diagnosis

National Alliance on Mental Illness

Dual diagnosis is a term for when someone experiences a mental illness and a substance abuse problem simultaneously. Either substance abuse or mental illness can develop first. Abusing substances can also lead to mental health problems because of the effects drugs have on a person’s moods, thoughts, brain chemistry and behavior.



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Survey of Addictions by Whatcom Community College is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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