The impact of marijuana decriminalization: an update.

The available evidence indicates that the "decriminalization" of marijuana possession had little or no impact on rates of use. Although rates of marijuana use increased in those U.S. states which reduced maximum penalties for possession to a fine, the prevalence of use increased at similar or higher rates in those states which retained more severe penalties. There were also no discernable impacts on the health care systems. On the other hand, the so-called "decriminalization" measures did result in substantial savings in the criminal justice system.