NCIt definition : A benzisoxazole derivative with antipsychotic property. Risperidone selectively antagonizes
serotonin (5-HT) effects via cortical 5-HT2 receptor, and, to a lesser extent, competes
with dopamine at the limbic dopamine D2 receptor. The antagonism leads to decreased
psychotic effects, such as hallucinations and delusions. In addition, risperidone
has low to moderate affinity for histamine H1, 5-HT1A, 5-HT1C, and 5-HT1D receptors,
while it has weak affinity for dopamine D1 and haloperidol-sensitive sigma site receptors.;