From a scientist, Linked does not mean causation. Correlation does not mean causation. NO there is not enough scientific evidence to support the Schizophrenia and psychosis hypothesis. AS for smoking too much cannabis? Easy thing. It is really hard to smoke too much cannabis. I don8217;t know if there is a such thing as too much. If you can8217;t handle your cannabis, just grab some Doritos, flavor not important. Grab a spot on the couch and chill. Enjoy it and stop worrying what others think about your cannabis use. If they can8217;t handle it, it thier problem. Curious about the acute impacts of cannabis for the occasional adult user, we asked two effects of marijuana smoke top researchers in the field to give us the blow-by-blow from inhalation (or ingestion) to intoxication to coming down from your high.