Potent D 1 antagonist (K i values are ~ 0.2, 0.3, ~ 1100, ~ 800 and ~ 3000 nM at D 1 , D 5 , D 2 , D 3 and D 4 receptors respectively). Also an agonist at 5-HT 1C/2C receptors (K i = 6.3 nM) in vitro .
R(+)-SCH-23390 hydrochloride is a selective D1 dopamine receptor antagonist. It has greater binding capacity towards 5-hydroxytryptamine 2 (5-HT2) and 5-HT1C serotonin receptor subtypes in in vitro. R(+)-SCH-23390 has a half-life of about 25 minutes after administration. It is known to possess anti-stereotypic effect and cataleptogenic effect. It also has inhibitory effect on motor activity.
