Purpose: To evaluate the effects of AC-1204 on cognition, activities of daily living, quality of life, pharmacokinetic measures, and safety in people with mild to moderate Alzheimer's disease.
Purpose: To determine whether positron emission tomography (PET) scanning can help distinguish patients with early Alzheimer's changes in their brains from those having other causes of cognitive impairment more accurately than current clinical practices.
Purpose: To assess the efficacy and safety of MK-8931 as a possible treatment for Alzheimer's disease.
Purpose: To evaluate the efficacy and safety of RO4602522 in people with moderate-stage Alzheimer disease who take donepezil or rivastigmine.
Purpose: To determine whether intensive blood pressure lowering will reduce the incidence of all-cause dementia, reduce the decline of global cognitive function in key specific domains, and show changes in brain structure.