Study of Eszopiclone Compared to Placebo in the Treatment of Insomnia Secondary to Perimenopause/Menopause

Inclusion Criteria * Subject must understand the purpose of the study and be willing to adhere to the study schedule and procedures described in this protocol. * Subject must be between the ages of 40 and 60 years, inclusive, on the day of signing consent. * Subject must have perimenopausal or menopausal signs and symptoms. * Subject must report SL of \>45 minutes and \<6 hours of TST at least three times a week over the previous month and symptoms of insomnia must post date onset of perimenopausal or menopausal symptoms. * Subject's physical exam must show no clinically significant abnormal findings (other than insomnia and menopause symptoms) at screening. Exclusion Criteria * Subject has history of circadian rhythm disorder, or travels across \>3 time zones on a regular basis. * Female subject is pregnant, lactating or within 6-months post partum. * Subject has a history of drug or alcohol abuse or dependence in the past 2 years or positive urine drug test at screening . * Subject has unstable medical abnormality, or unstable chronic disease; or history of significant cardiac, renal, or hepatic disease, seizure disorder, or current or past acute suicidal tendencies. * Subject has participated in any investigational drug study within 30 days prior to screening or plans to participate in another investigational drug study during participation in this study. * Subject is taking hormone replacement therapy or an hormonal contraceptive, and has not been on a stable dose for …