Thus, our results showing no differences in D2 / D3 receptor availability (except for a trend in ventral striatum), using a larger sample (24 marijuana abusers)
than that used for studies that identified reductions in striatal D2 / D3 receptors in alcoholics and
cocaine abusers, indicate that marijuana abusers,
different from other drug abusers, do not show significant striatal D2 / D3 receptor reductions.