History of active sleep disorder other than Research Diagnostic Criteria(RDC) insomnia criteria or any sleep or circadian rhythm disturbance;

Use of medications known to affect sleep wake function by Visit 2;

Involved in night or rotating shift work, or travel across \>4 time zones 14 days prior to screening and during study; regular daytime napping

PSG finding of apnea/hypopnea or periodic limb movement with arousal index \>10/hr on either night of PSG.

Effects Of Pregabalin (Lyrica) On Sleep Maintenance In Subjects With Fibromyalgia