RecruitingPhase 2Drug trialImpact of Intensive Treatment of SBP on Brain Perfusion, Amyloid, and Tau (IPAT Study)The purpose of this study is to determine if intensive lowering of systolic blood pressure (SBP), using FDA approved medications (antihypertensive), reduces Alzheimer's Disease pathology (i.e., excessive brain amyloid and tau protein deposition) in older adults at high risk for memory decline or dementia.