Pentiapine is a novel dopamine release inhibitor.The results show that Pentiapine dose-dependently reduces motor activity of mice. Moreover, Pentiapine dose-dependently reduces morphine-induced hyperactivity. Newman-Keuls post-hoc comparisons indicate that the group receiving morphine plus saline presents more activity than the groups receiving morphine plus 2 (P<0.05), 4, 8, 16, 24 and 32 (P<0.01) mg/kg of Pentiapine. Moreover, the groups receiving morphine plus 0.5, 1 and 2 mg/kg of Pentiapine present more activity than the groups receiving morphine plus 4, 8, 16, 24 and 32 mg/kg of Pentiapine (P<0.01)[1]. 30 mg/kg dose of Pentiapine completely blocks the methylenedioxymethamphetamine (MDMA) conditioned place preference (CPP) and also blocks the establishment of a cocaine CPP[2].
