Fluphenazine activity and antipsychotic response.
Plasma fluphenazine levels and plasma total neuroleptic activity (as quantitated by the neuroleptic receptor binding assay) were related to therapeutic response in 15 DSM-III schizophrenic patients who received a predetermined, fixed dose of fluphenazine for 14 days. Mean neuroleptic activity of the plasma was 84% greater than can be accounted for by the parent fluphenazine alone, and varied widely between patients. A sigmoidal relationship between total neuroleptic activity of plasma and response was found, with a continued plateau of response at higher total neuroleptic levels. Furthermore, the RBA data suggested (P less than 0.002) that two populations of drug-responsive schizophrenics exist which may be discriminated by the total D2 binding activity of plasma required for response.
D002849:Chromatography, Gas; D005476:Fluphenazine / Q000097:blood / Q000627:therapeutic use*; D006801:Humans; D011569:Psychiatric Status Rating Scales; D012559:Schizophrenia / Q000188:drug therapy*; D012565:Schizophrenic Psychology
D005476:Fluphenazine