Results of Sepracor's LUNESTA® Next-Day Driving Study in Patients with Primary Insomnia Presented at American College of Neuropsychopharmacology Meeting

Business Wire, Dec 6, 2006

MARLBOROUGH, Mass. -- Sepracor Inc. (Nasdaq: SEPR) today announces the presentation of results from a study of LUNESTA([R]) brand eszopiclone that measured the effects on actual next-morning driving ability and other objective assessments of cognitive and psychomotor function. Results from this randomized, double-blind, placebo-controlled, two-way crossover study in patients with primary insomnia will be presented today at the American College of Neuropsychopharmacology annual meeting in Hollywood, Fla. This study is unique in that it was comprised of patients with insomnia who drove automobiles in a controlled environment, in contrast to other driving studies conducted in computer-generated driving simulators.

The primary objective of this study was to assess next-day, actual on-the-road car-driving ability and cognitive and psychomotor performance in patients with primary insomnia administered either LUNESTA 3 mg or placebo the evening before. Next-day driving ability was assessed by brake-reaction time (BRT) in a dual-controlled car on a closed-circuit track the next morning. The study was conducted in 31 patients with primary insomnia as defined by DSM-IV([R] 1). This study was designed to scientifically and objectively measure a series of parameters that are sensitive to the residual effects of a drug on next-day performance, including information processing, divided attention, psychomotor tasks, working memory, and on-the-road driving.

In this study, there was no statistically significant difference in the primary endpoint of on-the-road BRT, following nighttime administration of LUNESTA 3 mg, compared with placebo. Consistent with the BRT findings, there were no statistically significant differences between subjects who were administered LUNESTA 3 mg versus placebo on a panel of secondary objective and subjective measures of cognitive and psychomotor function. Objective cognitive assessments included: Critical Flicker Fusion (measures central nervous system arousal via information-processing capacity and the ability to discriminate bits of sensory information), Sternberg Short-Term Memory Scanning Task (assesses working memory), and Rapid Visual Information Processing (assesses the performance of attention mechanisms in remaining vigilant to periodically recurring events). Psychomotor function measures included Choice Reaction Time (measures psychomotor performance by assessing the ability to attend to a critical stimulus), Continuous Tracking Task (bilateral task of psychomotor function and divided attention), and Digit Symbol Substitution Test (DSST; psychomotor function test). Subjective assessments of next-day ratings of morning sedation, coordination and mood as assessed by Leeds Sleep Analogue Rating Scale were also not significantly different between treatment groups.

You should not engage in any activity after taking LUNESTA that requires complete alertness, such as driving a car or operating machinery. You should use extreme care when engaging in these activities the morning after taking LUNESTA.

Subjective and objective polysomnography (PSG) assessments of various sleep parameters were also obtained during the study. Patients administered LUNESTA reported significantly improved (p < 0.0001) ease of getting to sleep and sleep quality, and there was no perceived behavior impairment after awakening. Objective measures of sleep by PSG demonstrated significant increases in total sleep time (p=0.0005) and sleep efficiency (p=0.0005); and significant reductions in time awake (p=0.0037), wake time after sleep onset (p=0.005), sleep onset latency (p=0.0001) and latency to persistent sleep (p < 0.0001) for patients administered LUNESTA versus patients administered placebo.

An estimated 36 percent of adult Americans reported suffering from either chronic or occasional insomnia in the last year2. Symptoms of insomnia include difficulty falling asleep, awakening frequently during the night, waking up too early, an inability to fall back to sleep, or awakening feeling unrefreshed.

About LUNESTA

LUNESTA is indicated for the treatment of insomnia in patients 18 years of age and older who are experiencing difficulty falling asleep and/or maintaining sleep through the night. LUNESTA is available in 1 mg, 2 mg and 3 mg tablets and treatment should be individualized based on patient age, history and insomnia symptoms. LUNESTA is a Schedule IV controlled substance.

Important Safety Information

LUNESTA is indicated for the treatment of insomnia. LUNESTA works quickly and should only be taken immediately before bedtime. Patients should have at least eight hours to devote to sleep before becoming active. Patients should not engage in any activity after taking LUNESTA that requires complete alertness, such as driving a car or operating machinery. Patients should use extreme care when engaging in these activities the morning after taking LUNESTA. Patients should not use alcohol while taking any sleep medicine. Most sleep medicines carry some risk of dependency. Patients should not use sleep medicines for extended periods without first talking to their doctor. Patients should see their doctor if they experience unusual changes in thinking or behavior, or if sleep problems do not improve in 7 to 10 days as this may be due to another medical condition. Side effects may include unpleasant taste, headache, drowsiness and dizziness.