Scientists Call Out Bad Data Linking Weed to Psychosis

Photo Credit: Kim J, Matthews NL, Park S. / Wikipedia

Photo Credit: Kim J, Matthews NL, Park S. / Wikipedia

Opponents of medical marijuana argue marijuana is linked to the development of psychosis, but now scientists are speaking out, claiming this argument has no sound basis. Dr. Charles Ksir and Dr. Carl Hart wrote a letter to the journal Lancet, which they feel has become the "journal of marijuana psychosis," explaining researchers jump to conclusions linking psychosis and cannabis because they disregard confounding variables that might cause co-occurring substance use or mental health disorders. They reviewed the literature themselves and found the link between cannabis-users and those diagnosed with psychosis could be the result of other factors that put certain groups at increased risk for substance misuse or mental disorders. They concluded, "After reviewing the scientific literature, we found evidence that bipolar disorder, anxiety disorder, and mood disorder have all been correlated with cannabis use, and reported that psychosis has been correlated with heavy tobacco smoking, heavy alcohol use, stimulant misuse, and sedative misuse. We found no clear evidence for a causal relation between cannabis and psychosis." 

Dr. Hart and Dr. Ksir's review on the topic was soon countered by a review written by Tabea Schoeler and her colleagues at Kings College London suggesting people who already experience psychosis may worsen their symptoms through marijuana use, and that finding the causal link between cannabis use and psychosis is unnecessary because research already "implicates cannabis use as a 'component cause' for psychotic symptomatology." Ksir and Hart argue this along with the many studies that already exist do not provide that causal relationship necessary to link marijuana use and psychosis because they do not take into account the important external factors.

We hope this information will help you rest assured that your medication may not lead to the development of psychosis. This information has been provided by High Times Magazine and approve by our Chief Medical Officer.