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There’s one thing we know Viagra does very well. But what other uses does it have? Can it, as has now been claimed in three separate studies, prevent Alzheimer’s disease?

In this priapic paid-only episode of The Studies Show, Tom and Stuart ask if there might be something to the theory that, through some vascular mechanism, Viagra might slow the effects of dementia. Or is that all just a phallus… er, fallacy?