Monitoring Drug Efficacy in Patients with Alzheimer's Disease

This study is tracking how well Alzheimer's disease medications work in newly diagnosed patients by monitoring changes in their gut bacteria (microbiome) alongside standard memory testing. The goal is to see if gut health plays a role in how patients respond to treatment. **You may be eligible if:** - You are 65 years old - You have been newly diagnosed with mild or moderate Alzheimer's disease dementia - A neurologist has confirmed a probable Alzheimer's diagnosis - You have not yet started Alzheimer's medications (or have been off them for at least 3 months) - You live in the National Capital Region (Philippines) - You can read and understand English or Filipino **You may NOT be eligible if:** - Your dementia has a different cause, such as stroke or vascular disease - You have untreated depression or psychiatric disorders in the past 6 months - You have taken antibiotics in the past 3 months - You regularly use immune-suppressing medications, steroids, or certain stomach acid medications Talk to your doctor to see if this trial is right for you.