Switching from Inadequate Adjunctive or Combination Treatment Options to Brexpiprazole Adjunctive to Antidepressant: An Open-Label Study on the Effects on Depressive Symptoms and Cognitive and Physical Functioning

Maurizio Fava, Takao Okame, Yuki Matsushima, Pamela Perry, Emmanuelle Weiller, Ross A Baker, Maurizio Fava, Takao Okame, Yuki Matsushima, Pamela Perry, Emmanuelle Weiller, Ross A Baker

Abstract

Background: Approximately 50% of patients with major depressive disorder do not respond adequately to their antidepressant treatment, underscoring the need for more effective treatment options. The objective of this study was to investigate the effect of adjunctive brexpiprazole on depressive symptoms in patients with major depressive disorder who were not responding to adjunctive or combination therapy of their current antidepressant treatments with several different classes of agents (NCT02012218).

Methods: In this 6-week, open-label, phase 3b study, patients with major depressive disorder who had an inadequate response to ≥1 adjunctive or combination therapy, in addition to history of ≥1 failure to monotherapy antidepressant treatment, were switched to adjunctive brexpiprazole. Efficacy was assessed by change from baseline to week 6 in Montgomery-Åsberg Depression Rating Scale total score. Patient functioning was assessed using the Sheehan Disability Scale and the Cognitive and Physical Functioning Questionnaire. Safety and tolerability were also assessed.

Results: A total of 51/61 (83.6%) patients completed 6 weeks of treatment with adjunctive brexpiprazole. Improvements in depressive symptoms were observed (least squares mean change from baseline to week 6 in Montgomery-Åsberg Depression Rating Scale total score, -17.3 [P < .0001]) as well as improvements in general and cognitive functioning (mean changes from baseline to week 6: Sheehan Disability Scale, -3.1 [P < .0001]; Massachusetts General Hospital-Cognitive and Physical Functioning Questionnaire, -9.2 [P < .0001]). The most common adverse event was fatigue (14.8%); akathisia was reported by 8.2% of patients.

Conclusions: In patients with major depressive disorder who had switched to open-label adjunctive brexpiprazole following inadequate response to previous adjunctive or combination therapy, improvements were observed in depressive symptoms, general functioning, cognitive function, and energy/alertness.

Keywords: adjunctive; antidepressant; brexpiprazole; major depressive disorder; switching.

© The Author 2016. Published by Oxford University Press on behalf of CINP.

Figures

Figure 1.
Figure 1.
Changes in depressive symptoms. (A) Mean change from baseline in Montgomery-Åsberg Depression Rating Scale (MADRS) total score. (B) Mean change from baseline in Clinical Global Impression-Severity of Illness (CGI-S) score. All patients received ADT+brexpiprazole 1 to 3 mg/d switched from previous adjunctive or combination treatment; primary antidepressant treatment (ADT) kept constant. Analyzed using mixed model repeated measures on observed cases (OC) data; P value relative to baseline. LS, least squares.
Figure 2.
Figure 2.
Response and remission rates for Montgomery-Åsberg Depression Rating Scale (MADRS) and response rates for Clinical Global Impression-Improvement (CGI-I). (A) Percentage of patients with MADRS response, defined as a ≥50% reduction from baseline in total score. (B) Percentage of patients with MADRS remission, defined as a total score decrease ≥50% from baseline and ≤10. (C) CGI-I response rates, defined as a score of 1 (very much improved) or 2 (much improved). All patients received ADT+brexpiprazole 1–3 mg/d switched from previous adjunctive or combination treatment; primary antidepressant treatment (ADT) kept constant. Analyzed by exact binomial 95% CI on observed cases (OC) data.
Figure 3.
Figure 3.
Changes from baseline in Sheehan Disability Scale (SDS) mean and domain scores. Analyzed using ANCOVA on observed cases (OC) data. LS, least squares.

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Source: PubMed

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