6-Month Chronic Efficacy & Safety Study of Eszopiclone in Adult Subjects With Primary Insomnia

This is a double blind, randomized (2:1; eszopiclone : placebo), placebo-controlled, multicenter, study of eszopiclone in subjects with primary insomnia. The study will involve up to 9 visits and subject participation will be approximately 224 days. After meeting all screening criteria, subjects will be randomized to either eszopiclone 3 mg QD or placebo. This study was previously posted by Sepracor Inc. In October 2009, Sepracor Inc. was acquired by Dainippon Sumitomo Pharma., and in October 2010, Sepracor Inc's name was changed to Sunovion Pharmaceuticals Inc.