Cannabis does not CAUSE psychosis
Psychcentral
“The results of the current study 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,” note the researchers."
psychcentral.com/news/2013/1…
National Institute of Health
"Conclusions: Substance-induced psychotic disorder appears to result from substantial drug exposure in individuals at high familial risk for substance abuse and moderately elevated familial risk for psychosis. Familial risk for psychosis, but not substance abuse, predicts progression from substance-induced psychosis to schizophrenia. Schizophrenia following substance-induced psychosis is likely a drug-precipitated disorder in highly vulnerable individuals, not a syndrome predominantly caused by drug exposure."
pubmed.ncbi.nlm.nih.gov/3105…
Psychology Today
"Today, medical science lacks sufficient data to make a definitive claim regarding whether smoking marijuana induces psychosis. If you’re young, consume a lot of high-dose marijuana products every day, and possess a genetic predisposition to psychosis, then yes, you are at risk."
psychologytoday.com/gb/blog/…
Very Well Mind
“Research suggests that people who have a co-occurring mental health disorder along with a substance use disorder are at a higher risk of developing psychosis associated with the substance or medication use.1 This may suggest that substances such as marijuana may trigger the onset of a psychotic episode in people who have a predisposed risk for psychosis.”
verywellmind.com/can-marijua…
UK Advisory Council on the Misuse of Drugs
“It is evident that the majority of young cannabis users do not develop psychotic illnesses. Those who do so must have one or more predisposing factors.”
[Those factors being genetic and environmental.]
“Anxiety and depression
12.10 The Council remains unconvinced that there is a causal relationship between the use of cannabis and the development of any affective disorder (Sections 8.12 and 8.13).”
assets.publishing.service.go…
“Researchers have associated cannabis use with risk for psychosis, cognitive impairment, and traffic accident. However, this review shows that the association between moderate cannabis use and psychosis is no stronger, and often considerably weaker, than the corresponding association for moderate tobacco use. The same holds for associations with cognitive impairment. For the risk of traffic accident, the review confirms that the risk from alcohol use is substantially stronger than the risk from cannabis use,…”
journals.sagepub.com/doi/ful…
From the National Institute of Health
“Predictors of cannabis-related mental and behavioral disorders include prior substance use disorders, other mental disorders, age, diabetes, and chronic obstructive pulmonary disease.”
pubmed.ncbi.nlm.nih.gov/3586…
State Cannabis Legalization and Psychosis-Related Health Care Utilization
“Findings In this cohort study of claims data from 63 680 589 beneficiaries from 2003 to 2017, there was no statistically significant difference in the rates of psychosis-related diagnoses or prescribed antipsychotics in states with medical or recreational cannabis policies compared with states with no such policy.”
jamanetwork.com/journals/jam…
“There was no significant association between any measure of cannabis use at baseline and either transition to psychosis, the persistence of symptoms, or functional outcome.”
pubmed.ncbi.nlm.nih.gov/3707…
No evidence to suggest cannabis use causes schizophrenia
“Most neuroscientists accept the conclusion that the origins of schizophrenia are to be found during gestation of the fetus. In other words, schizophrenia is regarded as a neurodevelopmental disorder.”
ualberta.ca/folio/2018/10/co…
Does marijuana cause depression in teenagers?
“Then researchers analyze the data and try to find patterns or relationships, but they cannot establish what causes what.
The Frontiers of Psychology study also stressed that it's possible that both cannabis use and mental health problems may be caused by something else, like teens' susceptibility to stress and anxiety mentioned earlier.”
msn.com/en-za/news/others/do…
Recreational marijuana laws and mental health treatment
“after a state adopts an RML, they experience a decrease in the average number of mental health treatment admissions”
pubmed.ncbi.nlm.nih.gov/3739…