First- and second-generation minority immigrants to Britain appear to have a higher risk of psychoses than white British individuals, researchers said. Dr. Jeremy W. Coid of St.

By Maria Cheng, Associated Press LONDON -- Using marijuana seems to increase the chance of becoming psychotic, researchers report in an analysis of past research that reignites the issue of whether pot is dangerous.

Using marijuana seems to increase the chance of becoming psychotic, researchers report in an analysis of past research that reignites the issue of whether pot is dangerous.

'Hazardous' drinking and drug use are much less severe but much more common than dependence.