Journal of Neural Transmission

, Volume 103, Issue 1–2, pp 191–216

Comparative pharmacodynamic studies with the novel serotonin uptake-enhancing tianeptine and — inhibiting fluvoxamine utilizing EEG mapping and psychometry

  • B. Saletu
  • J. Grünberger
  • P. Anderer
  • L. Linzmayer
  • G. Zyhlarz
Biological Psychiatry

Summary

In a double-blind, placebo-controlled study, the encephalotropic and psychotropic effects of tianeptine (TIA) — a new tricyclic antidepressant, enhancing serotonin reuptake — were investigated as compared with the serotonin reuptake inhibiting antidepressant, fluvoxamine (FLU), utilizing EEG mapping, psychometric and psychophysiological measures. 16 healthy volunteers (8 males, 8 females) aged 21–35 (man 27) years received randomized and at weekly intervals single oral doses of placebo, 12.5 and 25 mg TIA and 50mg FLU. EEG recordings, psychometric and psychophysiological tests and evaluation of pulse, blood pressure and side effects were carried out at 0,2,4,6 and 8 hours; blood sampling, in addition, at hour 1.

TIA plasma levels rose fast to peaks at 1–2 hours and declined rapidly as well, while the MC5 metabolite peaked in the 4th hour and declined more slowly. EEG mapping demonstrated that both TIA and FLU induced significant changes in brain function between the 1st and 8th hour, which, however, differed in their time course. 12.5 mg TIA exhibited, as compared with placebo, slight activating properties in the EEG (decrease of delta and theta, increase of alpha and beta, acceleration of the centroid), parallelled by thymopsychic improvement (mood elevation). 25 mg TIA showed EEG activation up to the 4th hour, later EEG sedation, accompanied by an initial thymopsychic improvement and differential changes thereafter (improved mood, decreased vigility), with the noopsyche improving at all times (attention, Pauli test). 50mg FLU induced initially sedation and thereafter activation, accompanied by thymopsychic deterioration and subsequent improvement, the latter also being observed in the noopsyche (attention, memory). In pupillary and skin conductance measures, generally a slight activation occurred after placebo, which was attenuated by 25 mg TIA. Correlation maps between plasma levels and EEG changes demonstrated: the higher the TIA plasma levels, the more absolute and relative beta power, the less alpha power and the faster the centroid of the total power spectrum, reflecting CNS-activation. Topographically, the correlations were mostly seen over both fronto-temporal regions. In the latter, dominant frequency signalled desactivation in the right and activation in the left hemiphere after both antidepressants, which thereby induced changes in brain function opposite to those observed in depression. Both drugs were well tolerated.

Keywords

Human pharmacology antidepressant tianeptine fluvoxamine serotonin pharmacokinetics pharmacodynamics EEG mapping psychometry 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • B. Saletu
    • 1
  • J. Grünberger
    • 1
  • P. Anderer
    • 1
  • L. Linzmayer
    • 1
  • G. Zyhlarz
    • 1
  1. 1.Department of Psychiatry, School of MedicineUniversity of ViennaViennaAustria

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