This is anecdotal, I don't have proof but it's something I think is somewhat related. Is that obesity and nuerodegenerative diseases are somewhat related. So that's a guess as to why some people might have though a weight loss drug would potentially be related in some way with alzheimers.

This could just be false though, I can't recall where I heard this information. So do some searching before quoting me.

Obesity often goes hand in hand with poorly regulated blood sugar and high blood pressure, both known risk factors for Alzheimer's.