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Related Experiment Videos

Gabapentin augmentation therapy in bipolar depression.

Po W Wang1, Claudia Santosa, Matthew Schumacher

  • 1Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94305-5723, USA. wangp0@stanford.edu

Bipolar Disorders
|December 14, 2002
PubMed
Summary

Adjunctive gabapentin (GBP) shows promise for treating bipolar depression. This open-label study found GBP well-tolerated and effective in mild to moderate cases, warranting further investigation.

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Area of Science:

  • Psychiatry
  • Neuroscience
  • Pharmacology

Background:

  • Bipolar disorder is a mood disorder characterized by alternating periods of mania and depression.
  • Gabapentin (GBP) is an anticonvulsant medication with potential mood-stabilizing properties.
  • Previous controlled studies have yielded mixed results regarding GBP's efficacy in bipolar disorder.

Purpose of the Study:

  • To evaluate the efficacy and tolerability of adjunctive gabapentin in patients with bipolar depression.
  • To assess the impact of GBP on depressive symptoms in a real-world clinical setting.

Main Methods:

  • A 12-week, open-label trial involving 22 outpatients with bipolar depression (HDRS > 18).
  • Patients received adjunctive GBP (mean dose 1725 mg/day) alongside existing mood stabilizers or atypical antipsychotics.

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  • Symptom severity was assessed using the Hamilton Depression Rating Scale (HDRS), Young Mania Rating Scale (YMRS), and Clinical Global Impression-Severity (CGI-S).

    • Main Results:

    • Adjunctive GBP led to a significant 53% decrease in HDRS scores from baseline to week 12 (p < 0.0001).
    • Over half of the patients (55%) experienced moderate to marked improvement, with a 78% reduction in HDRS scores.
    • Thirty-six percent of patients achieved remission (HDRS ≤ 8).
    • Patients with mild to moderate depression showed a higher response rate (77%) compared to those with severe depression (22%).
    • Gabapentin was well-tolerated by the study participants.

    Conclusions:

    • Adjunctive gabapentin appears effective and well-tolerated for mild to moderate bipolar depression.
    • The findings suggest GBP may be a valuable treatment option for specific subgroups of bipolar depression patients.
    • Further randomized controlled trials are necessary to confirm these preliminary findings and establish definitive treatment guidelines.