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Latest maintenance data on lamotrigine in bipolar disorder
Joseph R Calabrese1, Eduard Vieta, Melvin D Shelton
1Case Western Reserve University School of Medicine, University Hospitals of Cleveland, Cleveland, OH, USA. Joseph.Calabrese@uhhs.com
Summary
Lamotrigine and lithium are effective maintenance treatments for bipolar I disorder, significantly reducing mood episodes compared to placebo. Lamotrigine targets depression, while lithium targets mania, offering complementary benefits.
Area of Science:
- Psychiatry
- Pharmacology
- Clinical Trials
Background:
- Bipolar I disorder requires long-term maintenance treatment to manage mood episodes.
- Existing treatments like lithium have established efficacy but can have side effects.
- Novel therapeutic options are needed to improve maintenance treatment outcomes.
Purpose of the Study:
- To compare the efficacy and tolerability of lamotrigine versus lithium and placebo for maintenance treatment in bipolar I disorder.
- To assess lamotrigine's specific effectiveness against depressive and manic episodes.
- To evaluate the safety profile of lamotrigine in this patient population.
Main Methods:
- Two 18-month, randomized, double-blind trials.
- Involved 1315 patients with recent manic or depressed bipolar I disorder.
- Compared lamotrigine, lithium, and placebo for maintenance therapy.
Main Results:
- Both lamotrigine and lithium significantly extended time to any mood episode intervention versus placebo.
- Lamotrigine demonstrated primary efficacy against depressive episodes.
- Lithium showed primary efficacy against manic episodes; lamotrigine was well-tolerated with a placebo-like adverse event profile.
Conclusions:
- Lamotrigine is an effective and well-tolerated maintenance treatment for bipolar I disorder.
- Lamotrigine offers efficacy complementary to lithium, particularly for depressive symptoms.
- These findings support lamotrigine as a valuable option for bipolar I disorder maintenance therapy.