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BACKGROUND: Many patients with affective illness show partial or otherwise unsatisfactory responses to standard treatments, encouraging trials of combinations of pharmacologically dissimilar antidepressants. METHOD: Records of consecutive outpatients with affective disorders only partially responsive to treatment with a serotonin reuptake inhibitor (SRI) or bupropion, alone, were reviewed for changes in specific symptoms and risks of adverse events when an SRI and bupropion were combined. RESULTS: Greater symptomatic improvement was found in 19 (70%) of 27 subjects during a mean +/- SD of 11 +/- 14 months of combined daily use of bupropion (243 +/- 99 mg) with an SRI (31 +/- 16 mg fluoxetine-equivalents) than with either agent alone. Adverse effect risks were similar to those associated with each monotherapy, with a > 10% incidence of sexual dysfunction (N = 11, 41%), insomnia (N = 6, 22%), anergy (N = 4, 15%), and tremor (N = 3, 11%) during combined therapy; there were no seizures. CONCLUSION: With conservative dosing and close monitoring, combinations of SRIs with bupropion in this uncontrolled clinical series appeared to be safe and often more effective than monotherapy.
Bodkin et al. (1997) studied this question.