Premenopausal women

Dementia due to other causes than Alzheimer's disease

History of stroke

Immunocompromised

Active peptic ulcer, GI bleed, chronic inflammatory bowel disease, chronic diarrhea or past GI surgery that would impact drug absorption

Unstable Vitamin B-12 deficiency

Hematologic or solid malignancy within 5 years

Geriatric Depression Scale \>= 6

Unstable medical condition

Alcohol or drug abuse history with 12-months of study entry

Significant drug allergy

Alzheimer's disease modification experimental therapy with 12 months of study entry

Prisoners, compulsory psychiatric patients, or residents of nursing home or skilled nursing facility at entry

Any other experimental therapy with 30-days of study entry

A Phase II, Multicenter, Double Blind, Placebo-Controlled Safety, Tolerability Study of BMS-708163 in Patients With Mild to Moderate Alzheimer's Disease