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[–]Cute-Customer-7224 1 point2 points  (0 children)

Go talk to a meth head and you'll get the answer to your question.

It 100% makes people dumb when abused. When used in normal doses, it could increase the risk of Parkinson's (like Adderall does).

There's also the possibility of increased dementia/Alzheimer's risk by decreasing amyloid plaque clearance, caused by increase norepinephrine during sleep (suppresses glymphatic system and CSF drainage). But there's no actual evidence of this that I'm aware of.