Overview Study Evaluating Effects of SAM-531 on Sleep Electroencephalogram (EEG) and Quantitative Wake EEG in Healthy Subjects Status: Completed Trial end date: 2008-03-01 Target enrollment: Participant gender: Summary Primary: To evaluate the pharmacologic effect of single doses of SAM-531 on sleep EEG in healthy subjects. Phase: Phase 1 Details Lead Sponsor: Wyeth is now a wholly owned subsidiary of PfizerTreatments: Donepezil