Efficacy and Safety of Tasimelteon Compared With Placebo in Totally Blind Subjects With Non-24-Hour Sleep-Wake Disorder

2014-08-27 03:12:11 | BioPortfolio


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


Non-24-Hour Sleep-Wake Disorder (N24HSWD) occurs when individuals, primarily those without light perception, are unable to synchronize their endogenous circadian pacemaker to the 24-hour light-dark cycle, and the timing of their circadian rhythm instead reflects the intrinsic period of their endogenous circadian pacemaker. As a result, the circadian rhythm of sleep-wake propensity in these individuals moves gradually later and later each day if there circadian period is > 24 hours and earlier and earlier if < 24 hours. These individuals will be able to sleep well at night when their sleep-wake propensity rhythm is approximately aligned with the 24-hour light-dark and social cycle. However, after a short time, the endogenous sleep-wake propensity rhythm and the 24-hour light-dark cycle will move out of synchrony with each other, and they may have difficulty falling asleep until well into the night. In addition to problems sleeping at the desired time, the subjects experience daytime sleepiness and daytime napping.

This will be a multicenter, randomized, double-mask, placebo-controlled, parallel study. The study has three phases: the pre-randomization phase, the randomization phase, and the open-label extension. The randomization phase comprises the evaluation segment during which subjects will be asked to take either tasimelteon or placebo approximately 1 hour prior to their target bedtime for 26 weeks in a double-mask fashion. Subjects that complete the study will be given the opportunity to participate in the optional open-label extension (OLE) phase. During this phase, subjects will take open-label 20mg tasimelteon for an additional 26 weeks.

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment


Non-24-Hour Sleep-Wake Disorder


tasimelteon, Placebo


Not yet recruiting


Vanda Pharmaceuticals

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:12:11-0400

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