So, in the case where there’s no causal relationship, we’d expect to see about 22,320 people in the US who both used MDMA in the last year and are schizophrenic (3,100,000 MDMA users * 0.72%)
Given that there doesn’t seem to be a population-level study on this and the prevalence can explained without positing a causal relationship (definitely could find 32 folks at treatment centers out of 22,000), I think assuming causality here is a stretch.
Right, I linked to that wikipedia article because it gives a long list of drugs that may induce psychosis (including MDMA), and the citation it gives for MDMA causing psychosis is a single case report from 1991.
I’m confused—the wikipedia article you link to lists MDMA as one of the substances that induces psychosis. See also: https://​​en.wikipedia.org/​​wiki/​​Stimulant_psychosis#Substituted_amphetamines
https://​​www.karger.com/​​Article/​​Abstract/​​59383
The fact that this study had 32 participants from 2 drug treatment centers indicates to me that it’s not just a few cases.
Thanks, I didn’t find that study during my quick look.
I think this is a base-rates thing:
In the US, overall prevalence of schizophrenia is something like 7.2 people out of 1,000
In the US, around 3.1 million people use MDMA each year (In 2013, 1% tried in the last year * 2013 population of 316 million)
So, in the case where there’s no causal relationship, we’d expect to see about 22,320 people in the US who both used MDMA in the last year and are schizophrenic (3,100,000 MDMA users * 0.72%)
Given that there doesn’t seem to be a population-level study on this and the prevalence can explained without positing a causal relationship (definitely could find 32 folks at treatment centers out of 22,000), I think assuming causality here is a stretch.
Right, I linked to that wikipedia article because it gives a long list of drugs that may induce psychosis (including MDMA), and the citation it gives for MDMA causing psychosis is a single case report from 1991.