title: Increments in plasma homovanillic acid concentrations after neuroleptic discontinuation are associated with worsening of schizophrenic symptoms.
abstract: 1. Thirty-two male schizophrenic patients participated in this study. 2. Plasma concentrations of the dopamine metabolite, homovanillic acid (pHVA) were assessed once on neuroleptic medication and twice a week for a maximum of six weeks after its discontinuation. 3. Psychiatric symptomatology was assessed once on neuroleptic medication and once a week for a maximum of six weeks after its discontinuation, using the brief psychiatric rating scale (BPRS). 4. pHVA and total BPRS score increased significantly after discontinuation of neuroleptic as compared to baseline. 5. The magnitude of pHVA and BPRS increments after discontinuation of neuroleptic correlated significantly. 6. Results of this study suggest that worsening of schizophrenic symptoms after discontinuation of neuroleptic treatment is associated with increased pHVA concentrations.
authors.affiliation: Dept. of Psychiatry, Mount Sinai Medical Center/Bronx Veterans Administration Hospital, New York, NY.
authors.forename: R S
authors.initials: RS
authors.lastname: Khan
authors.forename: F
authors.initials: F
authors.lastname: Amin
authors.forename: P
authors.initials: P
authors.lastname: Powchik
authors.forename: P
authors.initials: P
authors.lastname: Knott
authors.forename: M
authors.initials: M
authors.lastname: Goldstein
authors.forename: S
authors.initials: S
authors.lastname: Apter
authors.forename: B
authors.initials: B
authors.lastname: Kerman
authors.forename: S
authors.initials: S
authors.lastname: Jaff
authors.forename: M
authors.initials: M
authors.lastname: Davidson
mesh_terms: D000328:Adult; D014150:Antipsychotic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D004334:Drug Administration Schedule; D006719:Homovanillic Acid / Q000097:blood*; D006801:Humans; D008297:Male; D012559:Schizophrenia / Q000097:blood / Q000188:drug therapy*; D012565:Schizophrenic Psychology
chemical_list: D014150:Antipsychotic Agents; D006719:Homovanillic Acid