Those who urge the legalization of marijuana maintain the drug is entirely safe. The available data suggested, this is not so, Marijuana occasionally produces acute panic reactions or even transient psychoses. Furthermore, a person driving under the influence of marijuana is a danger to themselves and others. If smoked heavily and a great deal of consistency, its use has been clearly associated with mental breakdown. In many persons who smoke chronically, the drug reinforces passivity and reduces goal-directed, constructive activity. The chron ....