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Cannabis Use in Outpatients With Mental Illness and Alcohol Use Disorders

Researchers tracked the behaviors of 121 adults with serious mental illness receiving outpatient addiction treatment for alcohol use disorder to evaluate the prevalence and impact of cannabis use on this group. Over seven months, 47 percent of participants submitted at least one cannabis-positive urine sample, and 27 percent of all collected samples were cannabis-positive. Findings showed that cannabis users were 2.2 times more likely to also use alcohol, and 2.5 times more likely to use cocaine than non-cannabis users. Cannabis users in this group were also more likely to engage in risky sexual behavior and report being homeless.

The study, “Prevalence and Correlates of Cannabis Use in Outpatients With Serious Mental Illness Receiving Treatment for Alcohol Use Disorders,” is published in Cannabis and Cannabinoid Research. The National Institute on Alcohol Abuse and Alcoholism supported this research effort.

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