The data are pretty clear that the incidence of psychosis, controlling for age, is higher among mj users than non-users. This was true even back when mj was a very mild tranquilizer. It appears the appropriate relationship is not causation but a triggering effect of thc in vulnerable persons.
This was true even back when mj was a very mild tranquilizer.
The currently available weed is, as you point out, a lot stronger than what was popularized in the 60's, and somewhat ridiculously vilified in films like "Reefer Madness". Seems to me that the currently available product, with high THC content makes just about everything worse. Mix alcohol and THC, you get a paranoid drunk. And mix it they do, it's almost a given baseline. And the old adage that "the dose makes the poison" seems to hold true with THC as well. I don't like the state regulating every aspect of our lives, but the tendency on the Libertarian left, and right to downplay the negative effects of weed are not helpful, either.
“It appears the appropriate relationship is not causation but a triggering effect of thc in vulnerable persons.”
Funny thing is, THC only effects us because we have receptors for cannabinoids in our brain. And we have cannabinoid receptors in our brains because our bodies produces its own cannabinoids. So if THC lighting up our cannabinoid receptors triggers psychosis or schizphrenia, why don’t those same receptors trigger psychosis or schizophrenia when activated by our own body’s endocannabinoids?