A Phase 1b, Randomized, Double-blind, Placebo-controlled Pilot Study to Evaluate the Effects of NMRA-323511 Among Healthy Elderly and Adults With Agitation Associated With Dementia Due to Alzheimer's Disease
This study consists of 2 parts, Part A and Part B. Part A is a single center, randomized, double-blind, placebo-controlled cohort designed to evaluate the safety, tolerability, and pharmacokinetics (PK) of NMRA-323511 among healthy elderly. Part B is a multicenter, randomized, double-blinded, placebo-controlled, parallel-group cohort to evaluate the safety, tolerability, and efficacy of NMRA-323511 among adults with Agitation Associated with Dementia due to Alzheimer's Disease. Part A consists of a Screening Period (up to 28 days), a 10-day Treatment Period, and a 10- day Follow-up clinic visit after last dose of study treatment. Part B consists of a Screening Period (up to 28 days), an 8-week Treatment Period, and a 10-day Follow-up clinic visit after last dose of study treatment.
⁃ Part A
• Healthy participants
• Age 65 to 80 years
• Body mass index (BMI) ≥18.0 and ≤32.0 kg/m\^2 at the screening and check-in visit
⁃ Part B
• Participants aged 55 to 90 years
• Diagnosis of probable AD or Alzheimer's clinical syndrome according to the National Institute of Aging-Alzheimer's Association criteria at least 12 months prior to screening
• Agitation meets the International Psychogeriatric Association (IPA) consensus definition
• Mini-Mental State Examination (MMSE) score = 5 - 24 (mild to severe dementia) at screening