Have problem of hyperhidrosis overall body so I tried every antiperspirant as well as oral medicines like glycopyrrolate and propranolol. No medicine works except oxybutynin 5 mg twice a day which I was taking according to doctor prescription online. But having few side effects like sleepiness, dry mouth. Then I take opinion from another doctor online ans he told me that this medicine is not safe in long term as it cause dementia, eye vision loss if taken jn long term. So is it true as I was taken it from 1 year till now.