Cannabis Facts December 10, 2013 Marijuana Does Not Cause Schizophrenia, Harvard Study Finds Zeke Becker A new Harvard study finds no evidence that marijuana causes schizophrenia. Categories: Best of the Web, Cannabis Facts, Marijuana News Tags: drug use, schizophrenia, study.By: Zeke Becker. Permalink: Shortlink: http://weedi.st/qu6N2 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.