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Schizophrenia and valproate.

Leslie Citrome1

  • 1Nathan S. Kline Institute for Psychiatric Research, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA. citrome@nki.rfmh.org

Psychopharmacology Bulletin
|March 17, 2004
PubMed
Summary

Valproate, an anticonvulsant, shows promise as an add-on therapy for schizophrenia. Combination treatments with divalproex and antipsychotics like risperidone or olanzapine improved symptoms faster than antipsychotic monotherapy.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Pharmacology

Background:

  • Valproate is an anticonvulsant frequently used as an adjunctive treatment for schizophrenia.
  • Its therapeutic effects are linked to its influence on voltage-gated ion channels and the g-aminobutyric acid (GABA) system, modulating neurotransmitter activity.
  • Existing evidence from case reports, retrospective studies, and clinical trials supports its combined use with antipsychotics.

Purpose of the Study:

  • To evaluate the efficacy of valproate as an adjunctive treatment in schizophrenia.
  • To compare the effectiveness of combination therapy (divalproex with antipsychotics) against antipsychotic monotherapy.
  • To explore the potential of valproate in specific patient subgroups and with novel formulations.

Main Methods:

  • A 28-day, double-blind, randomized clinical trial involving 249 patients diagnosed with schizophrenia.
  • Comparison of psychopathology improvement between patients receiving divalproex combined with risperidone or olanzapine versus those receiving monotherapy with risperidone or olanzapine.

Main Results:

  • Combination therapy with divalproex and either risperidone or olanzapine resulted in significantly faster improvement in psychopathology compared to monotherapy.
  • The study provides robust data supporting the benefits of adjunctive valproate in schizophrenia management.

Conclusions:

  • Adjunctive valproate, particularly in combination with antipsychotics like risperidone or olanzapine, offers a faster route to symptom improvement in schizophrenia.
  • Further research is warranted for treatment-refractory schizophrenia, agitation management, and the evaluation of extended-release divalproex formulations.

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