大象传媒

Dr Marta Di Forti, the author of a report told the programme the risk of psychosis is three times higher for users of potent strain of cannabis known as skunk, than for non-users.

Dr Di Forti, an academic psychiatrist at King's College London and lead author of the study, said 24% of cases of psychosis in their study were accountable specifically to skunk.

"If skunk use was abolished we could prevent up to 24% of new cases of psychotic disorder," said Dr Di Forti.

She added that those suffering from the psychosis were "extremely paranoid" and become "suspicious of their neighbours".