As always, "everyone's different". I have no trouble with fatigue or lack of focus on my meds.
Having said that, if iontophoresis works for you, that might be better. Since my main problem is cranio-facial, it's not the answer for me--though before I got on the meds, I often wanted to go soak my head!
It an eye pressure disorder that causes blindness. Robinul says the side effects can increase pressure. If eye pressure builds up, you can burn optic nerves and go blind.
So I have 2 disorders that most get when they're old.😮