psychiatrist

This work may not be copied, distributed, displayed, published, reproduced, transmitted, modified, posted, sold, licensed, or used for commercial purposes. By downloading this file, you are agreeing to the publisher’s Terms & Conditions.

Original Research

Olanzapine or Lamotrigine Addition to Lithium in Remitted Bipolar Disorder Patients With Anxiety Disorder Comorbidity: A Randomized, Single-Blind, Pilot Study

Giuseppe Maina, MD; Umberto Albert, MD, PhD; Gianluca Rosso, M.; and Filippo Bogetto, MD

Published: March 18, 2008

Article Abstract

Objective: The aim of the present randomized, single-blind, pilot study was to assess the efficacy of the addition of a second mood stabilizer, either olanzapine or lamotrigine, to lithium in patients with remitted bipolar disorder and comorbid anxiety disorder.

Method: Adult DSM-IV bipolar disorder patients with a current anxiety disorder and a Hamilton Rating Scale for Anxiety (HAM-A) score of 12 or higher, in remission from an affective episode for at least 2 months while on lithium maintenance treatment, were randomly assigned to receive 12 weeks of single-blind olanzapine 5 to 10 mg/day (N = 24) or lamotrigine 50 to 200 mg/day (N = 23) addition to lithium. The primary outcome measure was the HAM-A; secondary outcome measures were the Clinical Global Impressions-Severity of Illness scale and the Global Assessment of Functioning (GAF) scale. Data were collected from July 2005 to February 2007.

Results: Twenty-two patients in the olanzapine and 18 in the lamotrigine group completed the trial. Mean ± SD final doses of olanzapine and lamotrigine were, respectively, 7.7 ± 4.2 mg/day and 96.7 ± 46.7 mg/day in the intent-to-treat sample (N = 47). Both olanzapine and lamotrigine were effective in reducing HAM-A scores from baseline to endpoint (paired t test for completers: t = 11.361, df = 21, p < .001 for olanzapine and t = 6.301, df = 17, p < .001 for lamotrigine). Both drugs were also effective on the secondary outcome measures. Olanzapine was more effective than lamotrigine at weeks 6 and 12 with a last-observation-carried-forward analysis on all 3 outcome measures, while such differences disappeared on the HAM-A and GAF at week 12 with the visit-wise analysis.

Conclusions: The addition of a second mood stabilizer (olanzapine or lamotrigine) to lithium is effective in reducing anxiety symptoms in bipolar disorder patients with a co-occurring anxiety disorder.

Volume: 69

Quick Links:

Continue Reading…

Subscribe to read the entire article

$40.00

Buy this Article as a PDF