A pragmatic 12-week, randomized trial of duloxetine versus generic selective serotonin-reuptake inhibitors in the treatment of adult outpatients in a moderate-to-severe depressive episode.

Martinez JM, Katon W, Greist JH, Kroenke K, Thase ME, Meyers AL, Edwards SE, Marangell LB, Shoemaker S, Swindle R. A pragmatic 12-week, randomized trial of duloxetine versus generic selective serotonin-reuptake inhibitors in the treatment of adult outpatients in a moderate-to-severe depressive episode. International Clinical Psychopharmacology. 2012 Jan 1; 27(1):17-26.

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Abstract:

Some evidence suggests that medications that modulate both serotonin and norepinephrine may be more effective than selective serotonin-reuptake inhibitors (SSRIs) in severe major depressive disorder (MDD). This prospective pragmatic trial tests this hypothesis. Patients with severe MDD were randomly assigned to either duloxetine (a serotonin and norepinephrine-reuptake inhibitor) or physicians' choice of four generic SSRIs. Nonblinded, flexibly dosed treatment was used to mimic clinical practice. To address potential investigator bias, the patient-reported Quick Inventory of Depressive Symptomatology Self-Report (QIDS-SR) was used as the primary efficacy outcome measure. A total of 750 outpatients (19.2%, African descent; 14.8%, Hispanic) were randomized. The primary outcome, remission at week 12 by QIDS-SR, was numerically greater for duloxetine compared with SSRIs (36 vs. 32%), but this difference was not statistically significant. Mean changes in secondary outcomes were significantly superior in favor of duloxetine for the Hamilton Depression Scale-17 item, the Brief Pain Inventory, and the Sheehan Disability Scale. Remission superiority on the QIDS-SR was not achieved. Significantly greater benefit for duloxetine compared with SSRIs was demonstrated on measures of pain and functioning. Study demographics suggest a more generalizable racial and ethnic population than is typical in randomized clinical trials.