Is marijuana linked to psychosis, schizophrenia?
Those sounding the alarm include the nation’s “mental health czar,” as well as doctors in Colorado, California and Massachusetts where marijuana is legal for recreational use. They say the facts are irrefutable: Excessive use of high-THC pot and concentrated oil is linked to psychotic episodes that in some cases develop into full-blown schizophrenia.
There is great disagreement over the strength of the science linking pot and psychosis. Advocates on either side of the marijuana debate have different interpretations of the connection reported in a National Academies cannabis study in 2017 and other studies. In March, The Lancet, a British medical journal, reported a two to five times higher risk of psychotic disorders for daily consumers of high-THC marijuana compared with people who never used.