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  • Title: Economic impact of olanzapine plus fluoxetine combination therapy among patients treated for depression: a pilot study.
    Author: Corey-Lisle PK, Birnbaum H, Greenberg P, Marynchenko M, Dube S.
    Journal: Psychopharmacol Bull; 2003; 37(3):90-8. PubMed ID: 14608242.
    Abstract:
    Individuals with treatment-resistant depression (TRD) utilize more health care services and are significantly more costly. Drug treatments for TRD may include concomitant administration of multiple antidepressants or augmentation with mood stabilizers or antipsychotic agents. An augmentation strategy currently under investigation is the use of an olanzapine plus fluoxetine combination (OFC) therapy. The objectives for this pilot study were to use claims data to: (1) describe the extent of current use of OFC in patients with depressive disorders, and (2) compare health care utilization patterns and medical costs of patients receiving fluoxetine therapy before and after the initiation of olanzapine treatment. Data source consisted of medical, pharmaceutical, and disability claims from a Fortune 100 manufacturer from 1996 to 1998 (N>100,000). The sample included individuals with medical or disability claims for major depressive disorders treated with OFC (nOFC=36). Resource utilization and costs were compared for fluoxetine patients before and after the initiation of olanzapine treatment. Eleven percent of patients on combination therapy received olanzapine and fluoxetine. For patients on fluoxetine, there was a statistically significant reduction in health care utilization, and overall medical costs (20%), following initiation of olanzapine therapy. Overall, it appears the addition of olanzapine to ongoing fluoxetine therapy is effective in reducing outpatient, office, and inpatient utilization, as well as medical costs of patients treated for depression. Further research is needed to investigate combination therapy more fully.
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