I have used Prov almost since day one ( a year) and have had no side effects.
I started with 50mg in the morning and would take another 50mg in the afternoon.
Occasionally when I was having a very bad time in the afternoon, which is my hardest
time as far as fatique is concerned...I would wait go for the 100mg.
At night, my fatique is to overwhelming, even for Prov.
Lots of people in our position have said that Prov didn't help them at all. They had to
try other "uppers" that their doctors gave them, that seemed to work better.
For me, they work just fine and so far, no side effects for me.