The mixed findings observed in studies investigating the therapeutic potential of OXT in schizophrenia may be due to the impact of factors including task-specific effects, patient effects (e.g., age, sex, genetic variation in the OXT receptor, ancestry), and pharmacological effects (e.g., bioavailability, pharmacokinetics, neurotransmitter–drug interactions) [130]. This evidence concerns the gene OXT and schizophrenia.