Cannabis psychosis: examining the evidence for a distinctive psychopathology in a systematic and narrative review.
The American journal on addictions November 1, 2012 Alexander Baldacchino, Zoe Hughes, Michael Kehoe et al.
A systematic review of 13 studies found limited evidence that cannabis psychosis has a distinct symptom profile compared with other psychoses. Seven of eight methodologically adequate studies reported at least one statistically significant difference in psychopathology between cannabis-using and control groups, but the findings were inconsistent and the review's authors caution against generalization. The review concludes that, from a psychopathological perspective, cannabis psychosis may not be qualitatively different from other forms of psychosis. The authors call for clearer definitions and more rigorous study designs to resolve heterogeneity in future research.