- Mild-to-Moderate Alzheimer's disease
- Probable AD (National Institute of Neurological and Communicative Disorders and Stroke
and the Alzheimer's Disease and Related Disorders Association (NINCDS-ADRDA) and
Diagnostic and Statistical Manual of Mental Disorders-IV (DSM-IV)
- MMSE score 10-24 inclusive
- Computerized tomography (CT) san or magnetic resonance imaging (MRI) consistent with
AD
- Caregiver who cares for the patient at least 5 days per week
- Anti-dementia drugs including cholinesterase-inhibitors or N-methyl-D-aspartate
receptor (NMDA) receptor antagonists within 90 days
- Other causes of dementia
- Other primary psychiatric or neurological disorders
- Unstable medical illnesses or significant hepatic or renal disease