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  Vol. 59 No. 1, January 2002 TABLE OF CONTENTS
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Efficacy of Olanzapine in Combination With Valproate or Lithium in the Treatment of Mania in Patients Partially Nonresponsive to Valproate or Lithium Monotherapy

Mauricio Tohen, MD, DrPH; K. N. Roy Chengappa, MD; Trisha Suppes, MD, PhD; Carlos A. Zarate, Jr, MD; Joseph R. Calabrese, MD; Charles L. Bowden, MD; Gary S. Sachs, MD; David J. Kupfer, MD; Robert W. Baker, MD; Richard C. Risser, MSc; Elisabeth L. Keeter, RN, MSN; Peter D. Feldman, PhD; Gary D. Tollefson, MD, PhD; Alan Breier, MD

Arch Gen Psychiatry. 2002;59:62-69.

Background  A 6-week double-blind, randomized, placebo-controlled trial was conducted to determine the efficacy of combined therapy with olanzapine and either valproate or lithium compared with valproate or lithium alone in treating acute manic or mixed bipolar episodes.

Methods  The primary objective was to evaluate the efficacy of olanzapine (5-20 mg/d) vs placebo when added to ongoing mood-stabilizer therapy as measured by reductions in Young Mania Rating Scale (YMRS) scores. Patients with bipolar disorder (n = 344), manic or mixed episode, who were inadequately responsive to more than 2 weeks of lithium or valproate therapy, were randomized to receive cotherapy (olanzapine + mood-stabilizer) or monotherapy (placebo + mood-stabilizer).

Results  Olanzapine cotherapy improved patients' YMRS total scores significantly more than monotherapy (-13.11 vs -9.10; P = .003). Clinical response rates (>=50% improvement on YMRS) were significantly higher with cotherapy (67.7% vs 44.7%; P<.001). Olanzapine cotherapy improved 21-item Hamilton Depression Rating Scale (HAMD-21) total scores significantly more than monotherapy (4.98 vs 0.89 points; P<.001). In patients with mixed-episodes with moderate to severe depressive symptoms (DSM-IV mixed episode; HAMD-21 score of >=20 at baseline), olanzapine cotherapy improved HAMD-21 scores by 10.31 points compared with 1.57 for monotherapy (P<.001). Extrapyramidal symptoms (Simpson-Angus Scale, Barnes Akathisia Scale, Abnormal Involuntary Movement Scale) were not significantly changed from baseline to end point in either treatment group. Treatment-emergent symptoms that were significantly higher for the olanzapine cotherapy group included somnolence, dry mouth, weight gain, increased appetite, tremor, and slurred speech.

Conclusion  Compared with the use of valproate or lithium alone, the addition of olanzapine provided superior efficacy in the treatment of manic and mixed bipolar episodes.


From the Department of Psychiatry, Harvard Medical School, McLean Hospital, Belmont, Mass (Dr Tohen); Lilly Research Laboratories, Indianapolis, Ind (Drs Tohen, Baker, Feldman, Tollefson, and Breier, and Mr Risser and Ms Keeter); Western Psychiatric Institute & Clinic, University of Pittsburgh Medical Center, Pittsburgh, Pa (Drs Chengappa and Kupfer); Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas (Dr Suppes); Mood and Anxiety Disorders Program, National Institute of Mental Health, Bethesda, Md (Dr Zarate); Department of Psychiatry, Case Western Reserve, Cleveland, Ohio (Dr Calabrese); Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston (Dr Sachs); Department of Psychiatry, University of Texas Health Science Center, San Antonio (Dr Bowden). Drs Tohen, Feldman, Tollefson, and Breier and Mr Risser and Ms Keeter are stockholders in Eli Lilly & Co.



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A 12-Week, Double-blind Comparison of Olanzapine vs Haloperidol in the Treatment of Acute Mania
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Arch Gen Psychiatry 2003;60:1218-1226.
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Evidence-Based Guidelines for Treating Bipolar Disorder: Recommendations from the British Association for Psychopharmacology
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J Psychopharmacol 2003;17:149-173.
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The addition of olanzapine to valproate or lithium for acute manic or mixed bipolar episodes reduced manic symptoms
Gardner
Evid. Based Ment. Health 2002;5:89-89.
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Adjunctive Olanzapine in Refractory Mania
JWatch Psychiatry 2002;2002:6-6.
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