For me, at least one cup of caffeine a day helps, my neurologist says that is fine and does not hurt or help, though it does help if you are taking meds, because it gets the meds into your system quickly.
It often relieves the sharp pain for me, and helps me be a little faster on my feet when my brain is in a fog. I don't do it every day 'cause I don't want to get addicted, but I do like it a few times a week.
Good luck!
Margarite