I think my basic level of brain power is sufficient (for now), but if I lost a significant amount of function, I would take the pills to give me back what I lost. My mother has Alzheimer's and takes two different medications to help her cognitive function. They don't help a lot, but are supposed to help slow down her cognitive losses. If there was a pill that could restore her thinking to its earlier level, then I would wish that she would take it. And I would take it too if I had Alzheimer's.

I do take ADHD meds sometimes, and I believe these are considered cognitive enhancers.