Abstract
Bupropion, a noradrenaline/dopamine reuptake inhibitor, and venlafaxine, a serotonin/noradrenaline reuptake inhibitor, are both established antidepressants with proven efficacy in randomized controlled clinical trials. The objective of this double-blind, randomized, placebo- and active-controlled, eight-week, flexible-dose study was to evaluate the efficacy and tolerability of the once-daily extended-release formulations of these two antidepressants compared with placebo. Patients with major depressive disorder were randomized to once-daily treatment with bupropion XR 150 mg (n = 204), the extended-release formulation of venlafaxine (venlafaxine XR) 75 mg (n = 198) or placebo (n = 189) during weeks 1 to 4, with the option to double the dose at week 5 if response was inadequate. In this study, bupropion XR did not demonstrate statistically significant evidence of greater improvement from baseline compared with placebo on week 8 Montgomery Asberg Depression Rating scale scores (primary endpoint) or on secondary endpoints including CGI, HAM-A and responder and remitter analyses. Descriptive statistics for venlafaxine XR indicated separation versus placebo on MADRS total scores at week 8 and other intermediate time points, and on o...Continue Reading
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