Research from Italy “adds to previous evidence” of the role that substance abuse plays in first episode psychosis. The researchers point to substance abuse as a “potentially modifiable” environmental factor that could ameliorate the course of psychosis if identified at the outset.
Tarricone, I., Boydell, J., Panigada, S., Allegri, F.; The impact of substance use at psychosis onset on First Episode Psychosis course: Results from a 1 year follow-up study in Bologna. Schizophrenia Research. Online February 11, 2014. http://dx.doi.org/10.1016/j.schres.2014.01.014