In a 2003 issue of the Journal of International Neuropsychological Society is this study looking at the possible long-term residual effects of using cannabis. The results of this meta-analytic study failed to reveal a substantial, systematic effect of long-term, regular cannabis consumption on the neurocognitive functioning of users who were not acutely intoxicated. Read More
Published in the February 2015 issue of Lancet Psychiatry is this study looking at psychosis linked to use of potent cannabis. The risk of individuals having a psychotic disorder showed a roughly three-times increase in users of skunk-like cannabis compared with those who never used cannabis. Read More
Mental health and suicide rates – this discussion paper published in 2012, states, “Our results suggest that the passage of a medical marijuana law is associated with an almost 5 percent reduction in the total suicide rate, an 11 percent reduction in the suicide rate of 20- through 29-year-old males, and a 9 percent reduction in the suicide rate of 30- through 39-year-old males.” Read More
This 2014 study out of Japan indicated that genetic traits, specifically the CB1 receptor gene genotypes, are closely related to happiness. C allele carriers of the SNP of CNR1 who are sensitive to positive emotional stimuli may experience a higher magnitude pleasure response when they experience positive events and may have a higher subjective happiness level. Read More
The results of this 2013 study out of Harvard suggest that having an increased familial morbid risk for schizophrenia may be the underlying basis for schizophrenia in cannabis users and not cannabis use by itself. Read More
Psychiatric Times invited psychiatrists to complete a survey about medicinal marijuana and didn’t expect nearly 2200 people to complete that survey in just a few days. The results, reported in the July 2013 issue, reflect the current state of confusion among medical professionals regarding medical cannabis. Read More
Published in the British Journal of Psychiatry (2010) 197, 259-260.
