Cannabis doubles the risk of schizophrenia and other psyciatric conditions
Harald Wychgel,an expert at the Trimbos addiction Institute claimed that cannabis use leads to 200 additional cases of schizophrenia each year in the Netherlands. He said that about 400,000 young Dutch people regularly smoke cannabis and of these 400 fall victim to psychiatric difficulties or schizophrenia.About half of young Dutch mules come into contact with cannabis as do about 30 percent of young women, This group more frequently suffers from mental conditions due to daily cannabis use,Wychgel claimed

Source:Expatica news Oct 2003