Abaperidone is a potent antagonist of 5-HT2A receptor and dopamine D2 receptor with IC50s of 6.2 and 17 nM.
Abaperidone possesses good affinity for dopamine D2 receptors, together with a greater affinity for 5-HT2 receptors with IC50 of 17 and 6.2 nM, reaspectively[1].
The time course of the inhibition of climbing behavior for a period of several hours after oral administration of either 0.5 mg/kg of Abaperidone or risperidone is tested in mice. Also is included a comparative test of catalepsy induced by Abaperidone and risperidone along several hours following oral administration at several doses in rats. A somewhat lesser induction of catalepsy is observed for Abaperidone. A study of serum prolactin levels after oral administration of Abaperidone, haloperidol, and risperidone at 5 mg/kg for either 1 or 3 days in rats. Increases in prolactin levels after oral administration of Abaperidone are smaller than those for reference drugs[1].
[1]. Bolós J, et al. 7-[3-(1-piperidinyl)propoxy]chromenones as potential atypical antipsychotics. 2. Pharmacological profile of 7-[3-[4-(6-fluoro-1, 2-benzisoxazol-3-yl)-piperidin-1-yl]propoxy]-3-(hydroxymeth yl)chromen -4-one (abaperidone, FI-8602). J Med Chem. 1998 Dec 31;41(27):5402-9.