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Original Articles

Citalopram and Bupropion-SR: Combining Versus Switching in Patients With Treatment-Resistant Depression

Raymond W. Lam, MD, FRCPC; Helen Hossie, MD, FRCPC;Kevin Solomons, MB, FRCPC; and Lakshmi N. Yatham, M.B., FRCPC

Published: March 1, 2004

Article Abstract

Objective: There are limited data comparing medication strategies in patients with treatment-resistant depression. In this study, we compared the effects of combining citalopram and bupropion-SR versus switching to the other monotherapy in treatment-resistant depression.

Method: This was a naturalistic, open-label cohort study. Patients with DSM-IV major depressive disorder who had not responded to at least 1 previous antidepressant and at least 6 weeks of treatment with citalopram or bupropion-SR were treated in a standard clinical protocol. In alternate months, eligible consecutive patients were treated by adding citalopram or bupropion-SR, or by switching to the other medication. Patients were assessed at baseline and after 6 weeks of treatment with the 29-item version of the Structured Interview Guide for the Hamilton Depression Rating Scale, Seasonal Affective Disorders Version (SIGH-SAD).

Results: A total of 61 patients completed the study: 32 in the combination condition and 29 in the monotherapy switch condition. The combination condition was superior to the monotherapy switch in the SIGH-SAD change score (-14.8 vs. -10.1, respectively, p < .04) and the proportion of patients in clinical remission (28% vs. 7%, p < .05). There were no differences in the proportion of patients who had side effects or in the severity of the side effects experienced.

Conclusion: The results of this cohort study suggest that combining citalopram and bupropion-SR is more effective than switching to a monotherapy. Combination treatment was well tolerated with no greater side effect burden than monotherapy. Limitations of this study include the nonrandomized design, open-label treatment, and small sample size.

Volume: 65

Quick Links: Depression (MDD)

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