| Active, not recruiting | 2 | 380 | US | Nicotine Transdermal Patch, Placebo Patch | University of Southern California, National Institute on Aging (NIA), Vanderbilt University, Alzheimer's Therapeutic Research Institute | Mild Cognitive Impairment | 09/25 | 09/25 | | |
| Recruiting | N/A | 2000 | Canada, US | | University of Southern California, Northern California Institute of Research and Education, National Institute on Aging (NIA), Alzheimer's Therapeutic Research Institute | Mild Cognitive Impairment (MCI), Alzheimer's Disease (AD) | 12/24 | 12/24 | | |
| Recruiting | N/A | 1500 | Canada, US | Neuraceq, Florbetaben, Amyvid, Florbetapir, Tauvid, Flortaucipir, 18F-AV-1451, AV-1451, MK-6240, florquinitau F-18, [18F]MK-6240, NAV4694, [18F]NAV4694, [18F]AZD4694, PI-2620, [18F]PI-2620 | University of Southern California, Northern California Institute of Research and Education, National Institute on Aging (NIA), Alzheimer's Therapeutic Research Institute | Mild Cognitive Impairment, Alzheimer Disease, Dementia | 07/27 | 07/27 | | |