NOVEL MECHANISM RESEARCH ON NEUROPSYCHIATRIC SYMPTOMS (NPS) IN ALZHEIMER'S DEMENTIA (R21 CLINICAL TRIAL OPTIONAL) Two-year project period may not exceed $275,000, and no more than $200,000 may be requested in any single year. - June 16, 2026 National Institutes of Health (NIH)-R21 Exploratory/Developmental Research Grant* This NOFO encourages studies to improve understanding of the mechanisms behind neuropsychiatric.