DRD2 and Delusion: Further, the link between dopamine and delusions is supported by the effects of antipsychotics, which alleviate psychotic symptoms by antagonizing D2 dopamine receptors (Kaar et al., 2020) and by PET imaging studies showing dysregulated dopamine synthesis in individuals suffering from delusions and schizophrenia (Cheng et al., 2020; for a review, see Rigney et al., 2021).