Cannabis and mental illness: a review

Area of Science:

• Psychiatry
• Addiction Medicine
• Cannabis Research

Background:

• Increasing cannabis legalization necessitates understanding its impact on vulnerable populations, particularly those with mental illness.
• Individuals with mental health conditions may have heightened motivations for cannabis use due to seeking short-term rewards.
• Limited evidence supports cannabis benefits in psychiatric populations, with growing documentation of potential harms.

Purpose of the Study:

• To review the effects of cannabis use in individuals with mental illness.
• To reconcile addiction vulnerability and allostatic hypotheses to explain co-occurring addiction in mentally ill cannabis users.
• To develop a rational framework for assessing and treating problematic cannabis use in this demographic.

Main Methods:

• Literature review on cannabis effects in psychiatric populations.
• Theoretical reconciliation of addiction vulnerability and allostatic models.
• Framework development for assessment and treatment.

Main Results:

• Data on beneficial cannabis effects in psychiatric populations are scarce.
• Potential harms of cannabis use in patients with psychotic and mood disorders are increasingly recognized.
• Co-morbidity of addiction in mentally ill cannabis users can be explained by integrated theoretical models.

Conclusions:

• A comprehensive understanding of cannabis's impact on mental illness is crucial amidst legalization.
• Integrated theoretical frameworks aid in explaining and addressing problematic cannabis use in psychiatric patients.
• Developing tailored assessment and treatment strategies is essential for vulnerable populations.