PRL and schizophrenia: Serum prolactin level was also studied in treatment naive and medicated patients[58] and no differences were found between un-medicated patients and control subjects, refuting the hypothesis that there is a generalized hyper dopaminergic state.[58] Chatterjee[59] studied dopamine related hormones- prolactin, growth hormone and luteinizing hormone in 84 patients with acute schizophrenia.