Are pregnant, breastfeeding, or unwilling to practice birth control if appropriate during participation in the study.
Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data.
Presence of a major psychiatric disorder aside from anxiety or depression.
Presence of a medical condition other than PSP that could account for cognitive deficits (e.g. active seizure disorder, stroke, vascular dementia).
Presence of current substance abuse or substance dependence.
Presence of a significant systemic medical illness (e.g. significant cardiovascular, hematologic, renal, or hepatic disease).
Presence of current medication likely to affect sleep outcomes: benzodiazepine receptor agonists (e.g. Zolpidem), Suvorexant, sedating antipsychotics (e.g. Quetiapine), sedating antihistamines (e.g. Benadryl), low dose sedating antidepressants (e.g. Trazodone, Doxepin), over the counter sleep-inducing medications (e.g. Tylenol-PM), neuroleptics in the phenothiazine and haloperidol families) which 1) the potential participant is not able/willing to stop taking for 1- week prior and for the 6-week duration of the study and/or 2) if removed could have a persistent effect beyond the 1-week wash-out period.
Presence of insulin-dependent diabetes.
History of mental retardation.
Unable to communicate in English.