atigue
"DR started me out on 10mg XR for MS fatigue, which is very much like ADD but a different cause. 

10 worked okay at first.  Went to 25 XR heart raced badly by the time the extended kicked in. 

Settled on 20 and the results so far are good.  Take first thing in morning. I'm able to function basically all day.  Sleeping is a bit of an issue some days but not all.   

It's not a miracle drug for me but it's close.  I'm able to play golf play with my kids and do all my errands which I never had the energy to do.  

My only concern is tolerance build up but I do NOT take every day.  Only as needed which for me is about every other day. 

I am 47 male.  Does not mess w my libido.  I'm as interested as ever."