Remember They Told Us to Take an Aspirin Every Day (Or Any Pain Killer) Would Reduce Risk of Alzheimers?

I think you may be confusing Alzheimers and strokes, because they both cause dementia…

Aspirin is a low-level anti-coagulant== a blood thinner.
Strokes can occur if a clot forms in a blood vessel in your brain. So taking aspirin can help prevent strokes, hence the consequence of dementia.