Psychiatrists link marijuana to mental illnesses
Two psychiatrists from Philadelphia report in AMA Journal that moderate to heavy teen and young adult marijuana use with no prior mental illness may cause a range of effects from ego disturbances to psychosis. Based on 38 patients aged 13 to 24, the study notes poor social judgment, attention, and concentration, plus anxiety, low mood, and occasional delusions. one 17 year old girl attempted suicide while intoxicated, but remained euphoric afterward.