- Subject has a known or suspected sleep disorder, or another disorder associated with excessive daytime sleepiness, or any other diagnosis that would interfere with assessing sleepiness in subjects with study related induced sleepiness or abnormal findings on the initial PSG conducted on Day -1 such as, but not limited to, Apnea-Hypopnea Index (AHI) or Periodic Limb Movement Arousal Index (PLMAI) >10.