Young adults who started using cannabis at an early age and used it for several years are at increased risk of being diagnosed with a form of psychosis, of hallucinating or having delusions, a study published Monday found. The study conducted at the Queensland Brain Institute at the University of Queensland in Australia asked more than 3,800 young adults ...

The longer people use cannabis or marijuana, the more likely they are to experience hallucinations or delusions or to suffer psychosis, according to a study released Saturday. The study found that people who first used cannabis when they were aged 15 or younger were twice as likely to develop a "non-affective psychosis" -- which can include schizophrenia -- than those who had ...

NEW YORK (Reuters Health) - Young people who use marijuana (cannabis) are at increased risk of suffering hallucinations, delusions or other reality-distorting "psychoses." And the more time that's passed since first use, the higher the risk. The findings from a study by Dr. John McGrath, of the Queensland Center for Mental Health Research in Wacol, Australia, and colleagues confirm previous ...

LONDON (Reuters) - Young people who smoke cannabis or marijuana for six years or more are twice as likely to have psychotic episodes, hallucinations or delusions than people who have never used the drug, scientists said on Monday. The findings adds weight to previous research which linked psychosis with the drug -- particularly in its most potent form as "skunk" -- and will ...