Related Experiment Videos
Cannabis and psychosis.
Louisa Degenhardt1, Wayne Hall
1National Drug and Alcohol Research Centre, University of New South Wales, Sydney, Australia, 2502. l.degenhardt@unsw.edu.au
Current Psychiatry Reports
|May 11, 2002
Summary
Cannabis use may trigger psychosis in vulnerable individuals and worsen existing conditions, rather than directly causing it. People with schizophrenia may also be more prone to cannabis dependence.
Area of Science:
- Psychiatry
- Neuroscience
- Addiction Medicine
Background:
- The association between cannabis use and psychosis is well-documented but debated.
- Several hypotheses attempt to explain this complex relationship, including causality, precipitation, and shared risk factors.
Purpose of the Study:
- To critically evaluate the evidence supporting different hypotheses for the cannabis-psychosis association.
- To explore the role of the cannabinoid receptor system in schizophrenia.
Main Methods:
- Systematic review and synthesis of existing research on cannabis use and psychosis.
- Inclusion of recent findings on the endocannabinoid system and its implications for schizophrenia.
Main Results:
- Evidence does not support a direct causal link where cannabis causes psychosis in otherwise unaffected individuals.
- Findings suggest cannabis use can precipitate psychosis in vulnerable populations.
- Cannabis use is associated with increased relapse risk and higher likelihood of dependence in individuals with schizophrenia.
Conclusions:
- Cannabis use is unlikely to be a direct cause of psychosis but can act as a trigger in susceptible individuals.
- Cannabis use negatively impacts the course of schizophrenia, increasing relapse and dependence risk.
- Further research into the cannabinoid receptor system may offer insights into psychosis development and treatment.