Randomized, Controlled, Double Blind Trial of Eszopiclone for Insomnia Associated With Schizophrenia

Not Applicable

Completed

Brief Summary: The major goal of this project is to investigate established insomnia treatments in a schizophrenia population to see if the improved sleep leads to overall better quality of life. In addition, we hypothesize that the insomnia treatment may also lead to observed improvements in other symptoms associated with schizophrenia such as cognitive impairments, obesity, and negative symptoms.

Detailed Description: The primary aim of this study is to investigate the clinical efficacy of eszopiclone for the treatment of schizophrenia-related insomnia over 8 weeks. A two-week, single-blind placebo phase followed the double-blind phase to evaluate rebound and withdrawal effects after abrupt discontinuation.

Recruitment & Eligibility

Inclusion Criteria

Exclusion Criteria

Meet criteria for current alcohol or other substance dependence
A history of dementia, mental retardation or other neurological disorder
Not capable of giving informed consent for participation in this study.
Ongoing pregnancy
Known sensitivity to zopiclone.
Insomnia associated with medical disorders likely to impair sleep.
Use of any medication that affects sleep/wake function (other than antipsychotic medication), within the past 2 weeks or within a time period that is less than 7 half-lives since last use of the medication.
Lack of sleep benefit from previous adequate eszopiclone treatment
History of clinically significant hepatic impairment.
Subject is taking a potent cytochrome p450 3A4 inhibitor medication (ritonavir, nelfinavir, indinavir, erythromycin, clarithromycin, troleandomycin, ketoconazole, itraconazole) and is unwilling or it is clinically contraindicated to stop the medication.

Arm && Interventions

Group	Intervention	Description
Placebo Group	Placebo	Participants assigned to this arm will receive placebo (an inactive substance or a "sugar pill") to be taken each night for all weeks of the study.
Eszopiclone Group	Eszopiclone	Participants assigned to this arm will receive Eszopiclone 2mg each night for the first week then Eszopiclone 3mg each night for the remaining weeks.

Primary Outcome Measures

Name	Time	Method
Change in Insomnia Severity Index From Baseline.	8 Weeks	The Insomnia Severity Index (ISI) is a 7-item self-report questionnaire that provides a global measure of insomnia severity based on several indicators (e.g., difficulty falling or staying asleep, satisfaction with sleep, degree of impairment with daytime functioning). It has adequate internal consistency (Cronbach's alpha=0.91) and temporal stability (r=0.80), has been validated against sleep diary and polysomnography data and was sensitive to change in several insomnia treatment studies. The ISI scale range is: minimum = 0, maximum = 28. The interpretation is that lower is 'better sleep', while higher is considered 'worse sleep/more insomnia'.

Secondary Outcome Measures