- Healthy male subjects between the ages of 18 and 55 years Body Mass Index (BMI)
between 17.5 and 30.5 kg/m2; and a total body weight >50 kg
- History of any active sleep disorder.
- History of any sleep or circadian rhythm sleep disorder including RLS, narcolepsy,
sleep apnea, phase advance or delay syndromes within the past 5 years.
- Currently on or planning to be involved in night or rotating shift work or traveling
across more than four time zones in 14 days prior to screening.