Chunk #6 — Do cannabinoids cause short-lived positive psychotic symptoms, negative symptoms and cognitive deficits in the general population? — Anecdotal evidence, case reports, and surveys
but there have been a few reports of symptoms persisting for weeks [30, 35]. Cannabis may also precipitate persistent psychotic symptoms even in individuals who do not have a history or family history of psychosis. However, severe or persistent psychotic reactions are rare, and are more likely to occur in individuals with a preexisting psychiatric condition such as schizophrenia or personality disorders [35]. In some instances, psychotic symptoms have recurred in those individuals who resume using cannabis. Finally, psychotic symptoms appear to be dose-related.
