Daily Cannabis Use Associated With Earlier Onset of Psychosis.

Medscape (http://tinyurl.com/marijuana-and-early-psychosis 11/18) reported that, according to a study published in the Nov. issue of the American Journal of Psychiatry, “daily use of cannabis or tobacco has been linked to an earlier age of onset of prodromal and psychotic symptoms.” In a study of “109 patients (24% women) aged 18 to 40 years” who “were experiencing a first episode of psychotic symptoms,” Emory University School of Medicine researchers “classified patients according to their frequency of cannabis, alcohol, and tobacco use…before the onset of prodromal and psychotic symptoms.” After examining “changes in substance use over time,” the team discovered “significant effects of progression to both daily cannabis use and daily tobacco use on the risk for onset of psychosis,” with “a greater effect in” females.