We conducted a meta-analysis of associations between DRD2 variants and PRL levels.
Eleven studies with a total of 1073 antipsychotic-treated patients were included.
Overall, we found no associations between the two DRD2 variants and PRL levels.
In schizophrenia, PRL levels were significantly higher in DRD2 Taq1A A1 carriers.
DRD2 Taq1A may affect antipsychotic-related PRL levels in schizophrenic patients.