The patient was a 40-year-old with a 10-year history of schizophrenia, as well as chlorpromazine and thioridazine prescriptions (dosages unspecified). Following a diagnosis of prolactinoma, all previous antipsychotic medications were discontinued and bromocriptine was started. Thioridazine (25 mg/day) was restarted due to worsening psychiatric symptoms. Due to an increase in prolactin, thioridazine was discontinued and diazepam was started instead. This was not sufficient, and thioridazine (200 mg/day) was started once more and discontinued a bit later. Here, PRL is linked to schizophrenia.