title: Prolactin serum levels in paranoid versus nonparanoid male schizophrenia patients treated with risperidone.
abstract: The frequently seen side effect of hyperprolactinemia thought to be the 'price' paid for the antipsychotic treatment of schizophrenia. Various reports have linked the use of risperidone, an atypical antipsychotic drug, with the significant rise of prolactin levels. Thus, we set to assess possible difference between prolactin levels among schizophrenia subtypes in 45 male patients treated with stable doses (2-6 mg/day) of risperidone as antipsychotic monotherapy. All patients showed increased prolactin levels beyond the normal range, with a significant difference between the paranoid and all other groups (P<0.0001). Specifically, the paranoid patients' prolactin levels were higher than those of the schizoaffective and the disorganized ones. These results suggest that the blockade of higher dopamine activity in the paranoid schizophrenia corresponds to the prolactin increase, more than in the schizoaffective and disorganized subtypes. These findings are opposite of what was observed in the previous study of unmedicated patients.
authors.affiliation: Flügelman's Mazra Mental Health Medical Center, Acre, Israel.
authors.forename: Michael
authors.initials: M
authors.lastname: Segal
authors.forename: Avi
authors.initials: A
authors.lastname: Avital
authors.forename: Andrei
authors.initials: A
authors.lastname: Derevenski
authors.forename: Severina
authors.initials: S
authors.lastname: Berstein
authors.forename: Sergio
authors.initials: S
authors.lastname: Sandbank
authors.forename: Abraham
authors.initials: A
authors.lastname: Weizman
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D014150:Antipsychotic Agents / Q000009:adverse effects* / Q000627:therapeutic use; D018492:Dopamine Antagonists / Q000009:adverse effects* / Q000627:therapeutic use; D006801:Humans; D006966:Hyperprolactinemia / Q000139:chemically induced* / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011388:Prolactin / Q000097:blood*; D011618:Psychotic Disorders / Q000188:drug therapy; D018967:Risperidone / Q000009:adverse effects* / Q000627:therapeutic use; D012559:Schizophrenia / Q000188:drug therapy*; D012563:Schizophrenia, Paranoid / Q000188:drug therapy
chemical_list: D014150:Antipsychotic Agents; D018492:Dopamine Antagonists; D011388:Prolactin; D018967:Risperidone