Effect of Quetiapine on Sleep Architecture in Bipolar Depression and Major Depressive Disorder
Clinical practice indicates that Quetiapine has sedating properties, and its sedative effects may play an important role in restoring quality of sleep in patients with various psychiatric conditions who frequently experience sleep disturbances as part of their illness. It is well known that depressive disorders are very frequently associated with significant sleep disturbance. Sleep disruption is a feature of Bipolar Disorder during both Depressed and Manic/Hypomanic episodes. Considering that Seroquel has good antidepressant properties (Calabrese, 2004), the investigators suggest that Seroquel's effect on sleep architecture contributes to its antidepressant properties.
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Effects of Seroquel on Sleep Architecture in Patients With Bipolar Depression or Major Depressive Disorder - An Open Label Study|
- Sleep quality as measured by overnight PSG. [ Time Frame: baseline, day 2 to 4 (early) and day 21 to 28 (longer term). Optional reading at day 42-56 ] [ Designated as safety issue: No ]
|Study Start Date:||May 2006|
|Study Completion Date:||January 2009|
|Primary Completion Date:||January 2009 (Final data collection date for primary outcome measure)|
Seroquel added to medication regime and sleep quality measured
The dosage is flexible from 50-600 mg based on the investigator's clinical judgement and patient tolerance. It may be raised or lowered at will.
Other Name: Quetiapine
To assess the objective (polysomnographic) change in sleep quality before and after introduction of Seroquel (Quetiapine) in treatment of patients with Bipolar Depression or Major Depressive Disorder.
To assess the objective (polysomnographic) and subjective changes in sleep quality parameters before and at different stages after introduction of Seroquel (Quetiapine) treatment, longitudinally, and to correlate these changes with measures of illness severity.
Prospective polysomnographic (PSG) study of patients before and after treatment with Seroquel (Quetiapine). PSG recordings will be done three (optional four) times during the study: before starting the Seroquel (Quetiapine) (baseline), at day 2 to 4 (early) and day 21 to 28 (longer term). (Optional fourth PSG can be done at day 42-56). PSG will be completed at patients home with a portable PSG.