Description: Risperidone is a serotonin and dopamine receptor antagonist. It is approved for the treatment of schizophrenia, and is sometimes prescribed as an adjunct therapy for the treatment of aggression, Tourette's syndrome, bipolar disorder, obsessive-compulsive disorder and other disorders. (3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]- 6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one)