• Michael Bauer, Koen Demyttenaere, Nizar El-Khalili, Michael E Thase, George I Papakostas, Johan Szamosi, Willie R Earley, and Hans Eriksson.
• aDepartment of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Dresden, Germany bDepartment of Psychiatry, University Hospital Gasthuisberg, Leuven, Belgium cAlpine Clinic, Lafayette, Illinois dDepartment of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania eDepartment of Psychiatry, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA fFormer AstraZeneca R&D, Södertälje, Sweden gFormer AstraZeneca Pharmaceuticals, Wilmington, Delaware, USA.
• Int Clin Psychopharmacol. 2014 Jan 1; 29 (1): 16-25.

AbstractThis pooled analysis evaluated the efficacy of extended-release quetiapine fumarate (quetiapine XR) adjunct to selective serotonin reuptake inhibitors (SSRIs) or serotonin-norepinephrine reuptake inhibitors (SNRIs) in patients with major depressive disorder (MDD). Pooled data were analyzed from two 6-week, double-blind, randomized, placebo-controlled trials of adjunct quetiapine XR (150 and 300 mg/day) in patients with MDD and inadequate response to initial antidepressant monotherapy. This post-hoc analysis included evaluation of change from randomization at week 6 in Montgomery Åsberg Depression Rating Scale (MADRS) total scores (primary endpoint), and week 6 MADRS response and remission rates for quetiapine XR as an adjunct to ongoing SSRI or SNRI. In total, 189, 178, and 202 patients received quetiapine XR 150 mg/day+SSRI, 300 mg/day+SSRI, and placebo+SSRI, respectively, whereas 82, 90, and 76 patients, respectively, received quetiapine XR 150 mg/day+SNRI, 300 mg/day+SNRI, and placebo+SNRI. At week 6, quetiapine XR 150 mg/day+SSRI and 300 mg/day+SSRI reduced the MADRS total score from randomization versus placebo+SSRI [least squares mean (LSM) change, -14.70 (P<0.05) -14.72 (P<0.05) vs. -12.59, respectively]. Quetiapine XR 150 mg/day+SNRI (LSM change, -14.68, P<0.01) and 300 mg/day+SNRI (LSM change, -14.99, P<0.01) also reduced the MADRS total score from randomization at week 6 versus placebo+SNRI (-10.77). In conclusion, in patients with MDD and inadequate response to ongoing antidepressant, adjunct quetiapine XR (150 and 300 mg/day) was effective in both SSRI and SNRI subgroups.

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