Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: A Multicenter, Randomized, Double-Mask, Placebo-Controlled, Parallel Study to Investigate the Efficacy and Safety of 20 mg Tasimelteon Versus Placebo in Totally Blind Subjects With N24HSWD Followed by
Brief Summary: The purpose of this study is to evaluate the efficacy and safety of a six month double-mask treatment of tasimelteon or placebo in male and female subjects with Non-24-Hour Sleep-Wake Disorder