Risperidone is a member of the class of pyridopyrimidines that is 2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one carrying an additional 2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl group at position 2. It has a role as a serotonergic antagonist, an alpha-adrenergic antagonist, a H1-receptor antagonist, a second generation antipsychotic, a dopaminergic antagonist, a psychotropic drug and an EC 3.4.21.26 (prolyl oligopeptidase) inhibitor. It is a pyridopyrimidine, an organofluorine compound, a heteroarylpiperidine and a member of 1,2-benzoxazoles. ChEBI Risperidone is a second-generation antipsychotic (SGA) medication used in the treatment of a number of mood and mental health conditions including schizophrenia and bipolar disorder. It is one of the most widely used SGAs. [Paliperidone], another commonly used SGA, is the primary active metabolite of risperidone (i.e. 9-hydroxyrisperidone). Schizophrenia and various mood disorders are thought to be caused by an excess of dopaminergic D2 and serotonergic 5-HT2A activity, resulting in overactivity of central mesolimbic pathways and mesocortical pathways, respectively. Risperidone is thought to reduce this overactivity through inhibition of dopaminergic D2 receptors and serotonergic 5-HT2A receptors in the brain. Risperidone binds with a very high affinity to 5-HT2A receptors, approximately 10-20 fold greater than the drug’s binding affinity to D2 receptors, and carries lesser activity at several off-targets which may responsible for some of its undesirable effects. DrugBank Risperidone is an Atypical Antipsychotic. FDA Pharm Classes View More…