According to FA 2019, page 561
MECHANISM of atypical psychotics(including Risperidone) is Not completely understood. but Most are 5-HT2and D2 antagonists; Varied effects on ฮฑ and H1 receptors.
These SGAs Have lower binding affinity for D2 receptor than FGAs. so less Extra pyramidal S/E.
submitted by justtryingtopass(6)
Assume schizophrenia d/t presentation is young male late teens/early 20s. Atypical antipsychotics (Risperidone) are first line.