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Psychopharmacology

, Volume 77, Issue 1, pp 58–65 | Cite as

Serum concentrations of cis(Z)-flupentixol and prolactin in chronic schizophrenic patients treated with flupentixol and cis(Z)-flupentixol decanoate

  • A. Jørgensen
  • J. Andersen
  • N. Bjørndal
  • S. J. Dencker
  • L. Lundin
  • U. Malm
Original Investigations

Abstract

Nine chronic schizophrenic patients selected from three hospital departments were treated with flupentixol (orally and IV) and cis(Z)-flupentixol decanoate in Viscoleo (IM) in a three-phase pharmacokinetic study. Oral administration (single and repeated dosage) showed a relatively slow absorption with maximum serum concentration around 4 h after administration. Intravenous injection indicated multicompartment kinetics for cis(Z)-flupentixol. The biological half-lives calculated after the different doses were the same, indicating that the pharmacokinetics of cis(Z)-flupentixol does not differ between single and repeated administration and does not change when moderately higher doses are given. The bioavailability of orally administered cis(Z)-flupentixol was calculated to be about 40% with IV injection as reference. After IM administration maximum serum concentration was seen between 4 and 10 days in most patients. Calculation of a disappearance half-life gave very variable results, indicating that the release of the drug from the oil depot is not a monoexponential process. The intramuscular depot had a much lower bioavailability than IV injection, which means that steady state has not been obtained after 8 weeks of depot treatment. Serum prolactin concentrations were elevated during neuroleptic treatment, but no correlation was found between prolactin concentrations and the serum concentrations of cis(Z)-flupentixol. A correlation between the changes in clinical ratings and concentrations of cis(Z)-flupentixol or prolactin was not found.

Key words

Neuroleptic Flupentixol Flupentixol decanoate Serum levels Prolactin 

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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • A. Jørgensen
    • 1
  • J. Andersen
    • 2
  • N. Bjørndal
    • 3
  • S. J. Dencker
    • 4
  • L. Lundin
    • 4
  • U. Malm
    • 4
  1. 1.Biochemical DepartmentH. Lundbeck & Co. A/SCopenhagen-ValbyDenmark
  2. 2.Department ESct. Hans HospitalRoskildeDenmark
  3. 3.Department HSci. Hans HospitalRoskildeDenmark
  4. 4.Department IILillhagen HospitalGothenburgSweden

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