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Concurrent Disorders

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General Information for Use With Clients


What is a Concurrent Disorder ?

Concurrent disorders (CD for short) generally describes a situation in which a person experiences a psychiatric disorder and either a substance use disorder and/or a gambling disorder. It is important to keep in mind that there are many different kinds of problems that are covered by these various terms (psychiatric disorder etc); as a result, CD presents itself in many different forms.

For example, someone living with schizophrenia who has problems with cannabis use has a concurrent disorder, and so does a person who has problems with alcohol use and has a clinical depression.

For more information about concurrent disorders, click here.


Guide à l'intention des familles sur les troubles concomitants

Help for families dealing with the effects of a concomitant disorder experienced by a loved one.


Les troubles concomitants de toxicomanie et de santé mentale : Guide d’information

Basic information about concurrent disorders, their treatment and their management.


Concurrent disorders – Canadian Mental Health Association, Ontario Branch

(English only) - General information and fact sheets


Concurrent Disorders: Mental Disorders and Substance Use Problems

(English only) - Fact Sheets on concurrent disorders, BC resource


Meilleures pratiques - Troubles concomitants de santé mentale et d'alcoolisme et de toxicomanie – Santé Canada - 2002

 Health Canada best practices guidelines


Inventaire national des programmes - Troubles concomitants de santé mentale et d'alcoolisme et de toxicomanie

Inventory on concurrent disorders programs