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Efficacy of Seroquel SR in Combination With an Antidepressant in Treatment of Major Depressive Disorder

A Multi-Centre, Double-Blind, Randomised, Parallel-Group, Placebo-Controlled Phase III Study of the Efficacy and Safety of Quetiapine Fumarate Sustained Release (Seroquel SRTM) in Combination With an Antidepressant in the Treatment of Patients With Major Depressive Disorder With Inadequate Response to an Antidepressant Treatment

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00351910
Acronym
ONYX
Enrollment
494
Registered
2006-07-13
Start date
2006-05-31
Completion date
2007-04-30
Last updated
2011-01-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Major Depressive Disorder

Keywords

Major Depressive Disorder, MDD

Brief summary

To evaluate the efficacy of quetiapine fumarate sustained release (Seroquel SR™) in combination with an antidepressant versus an antidepressant alone in patients with Major Depressive Disorder. PLEASE NOTE: Seroquel SR and Seroquel XR refer to the same formulation. The SR designation was changed to XR after consultation with FDA.

Interventions

DRUGQuetiapine
DRUGAmitriptyline
DRUGBupropion
DRUGCitalopram
DRUGDuloxetine
DRUGEscitalopram
DRUGFluoxetine
DRUGParoxetine
DRUGSertraline
DRUGVenlafaxine

Sponsors

AstraZeneca
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Male or female aged 18 to 65 years * A documented diagnosis of major depressive disorder

Exclusion criteria

* Patients with a DSM IV Axis I disorder other than MDD within 6 months of enrolment * Patients with a diagnosis of DSM IV Axis II disorder which has a major impact on the patient's current psychiatric status * Patients whose current episode of depression exceeds 12 months or is less than 4 weeks prior to enrolment

Design outcomes

Primary

MeasureTime frame
To evaluate the efficacy of quetiapine fumarate sustained release
(Seroquel SR™) in combination with an antidepressant versus an antidepressant alone in patients with Major Depressive Disorder.

Secondary

MeasureTime frame
If quetiapine SR in combination with an antidepressant improves health-related quality of life of patients with MDD, compared to an antidepressant alone.

Countries

Australia, Belgium, Canada, Czechia, Finland, France, Germany, Norway, Poland, Romania, South Africa, Sweden

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 3, 2026