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Related Experiment Videos

Valproate attenuates dextroamphetamine-induced subjective changes more than lithium.

Morgan C Willson1, Emily C Bell, Sanjay Dave

  • 1Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada.

European Neuropsychopharmacology : the Journal of the European College of Neuropsychopharmacology
|June 14, 2005
PubMed
Summary

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Lithium and valproate were tested for their effects on dextroamphetamine-induced changes in healthy volunteers. Valproate showed broader attenuation of mood and physiological effects compared to lithium.

Area of Science:

  • Neuropharmacology
  • Psychopharmacology

Background:

  • Dextroamphetamine induces subjective and physiological effects similar to mania in healthy individuals.
  • Previous research on lithium's ability to attenuate these effects yielded conflicting results.
  • The impact of valproate on dextroamphetamine-induced changes had not been previously investigated.

Purpose of the Study:

  • To investigate the effects of pre-treatment with lithium and valproate on dextroamphetamine-induced mood and physiological changes.
  • To compare the efficacy of lithium and valproate in attenuating dextroamphetamine's effects.

Main Methods:

  • A double-blind, placebo-controlled study involving three groups: sodium valproate (1000 mg/day), lithium (900 mg/day), or placebo, each for 14 days.
  • Volunteers received a 25 mg dose of dextroamphetamine post-pre-treatment.

Related Experiment Videos

  • Subjective and physiological measures were recorded before and at two time points after dextroamphetamine administration.

    • Main Results:

    • Lithium pre-treatment significantly attenuated dextroamphetamine-induced changes in happiness only.
    • Valproate pre-treatment significantly attenuated dextroamphetamine's effects on happiness, energy, alertness, and diastolic blood pressure.
    • Significant differences were observed in the response to dextroamphetamine between the treatment groups.

    Conclusions:

    • Lithium and valproate exhibit distinct mechanisms of action in attenuating dextroamphetamine-induced effects.
    • Valproate demonstrates a broader range of attenuation compared to lithium.
    • These findings may offer insights into the differing mechanisms of action of lithium and valproate in mood disorders.