Safety of study drug was assessed by clinical laboratory assessments, vital signs, weight, 12-lead electrocardiogram (ECG), physical and neurological examination. Treatment-Emergent Adverse Events (TEAEs) were defined as any event not present prior to the initiation of study treatment or any event already present that worsens in either intensity or frequency following exposure to study treatment. Serious adverse events were defined as AEs that led to or were life-threatening, resulted in or prolonged hospitalization, caused important or long-lasting disability, caused congenital abnormality or malformation, or resulted in death. Adverse drug reactions were defined as any harmful or unintended reaction to study treatment and were considered possibly related or probably related to study drug. Specific AEs and SAEs due to changes in clinical laboratory assessments, vital signs, weight, ECG, and physical and neurological exam are listed in the safety section.

Safety population included all participants who received at least one dose of study treatment and had at least one postbaseline safety assessment.

The MMSE was used to measure cognitive impairment. The MMSE can evaluate overall cognitive function, and is widely used for the assessment of cognitive impairment in dementia patients. The questionnaire consists of 11 items, and each item aims to evaluate different cognitive domains such as orientation, memory, attention, and construction. The score ranged from 0 to 30, with a higher score indicating better function. A positive change score indicated improvement from baseline. The mean change was analyzed by Wilcoxon's signed rank test.

Efficacy analysis population included all participants who took at least one dose of study drug and had at least one baseline and at least one post-baseline assessment of the efficacy parameter. Twenty participants had no efficacy variables collected.

The NPI-Q assessed twelve behavioral domains common in dementia including; hallucinations, delusions, agitation/aggression, dysphoria/depression, anxiety, irritability, disinhibition, euphoria, apathy, aberrant motor behavior, sleep/night-time behavior change, and appetite/eating change. The questionnaire is given by the clinician to the patient's caregiver who was asked if the behavior described is present in the patient. If "Yes", the informant then rates both the Severity of the symptoms present within the last month on a 3-point scale (1 = mild, 2= moderate, and 3= severe) and the associated impact of the symptom manifestations on them (i.e. Caregiver Distress) using a 5-point scale (0 = not distressing at all, 1 = minimal, 2 = mild, 3 = moderate, 4 = severe, and 5 = extreme or very severe). The total severity score represents the sum of individual scores and ranges from 0 to 36. The total distress score represents the sum of individual symptom scores and ranges from 0 to 60.

Efficacy analysis population included all participants who took at least one dose of study drug and had at least one baseline and at least one post-baseline assessment of the efficacy parameter. Twenty participants had no efficacy variables collected.