A Study of ONO-2020 in Patients With Agitation Associated With Alzheimer's Disease Dementia

Diagnosis of dementia not due to AD or any other disorder with memory impairment, such as mixed dementia, vascular dementia, Lewy body dementia, dementia associated with Parkinson's disease, frontotemporal dementia, drug-induced dementia, dementia associated with human immunodeficiency virus (HIV) infection, traumatic brain injury, normal pressure hydrocephalus, or other non-AD dementia

Any MRI or CT scan of the brain performed after the onset of dementia with findings consistent with clinically relevant CNS disease other than AD, such as vascular changes (eg, cortical cerebral infarction, multiple cerebral infarctions), space-occupying lesions (eg, tumors), or any other major structural brain disease

Delirium within 30 days before the start of the screening period or a history of delirium

At risk of suicide according to the Columbia-Suicide Severity Rating Scale (C-SSRS) (answers "yes" to Question 4 or 5 of the suicidal ideation section of the C-SSRS) or any suicide attempt within 6 months before the start of the screening period, or at serious risk of suicide in the opinion of the investigator or subinvestigator