ANKK1 and schizophrenia: For the first time we demonstrate that allele rs2734849*T of ANKK1 gene mitigates the risk of antipsychotic‐induced HPRL in schizophrenia suggesting for a protective effect against developing this side effect, whereas carriage of the rs2734849*С allele was a relative risk factor for antipsychotic‐induced HPRL in schizophrenia.