Thanks Theta Z, Mark, and Mokey.

Mark, I know someone that had a tilt table test. My sense is that passing out is common. Did you have that experience? Does it give the same information as an MRA, or slightly different info?

Mokey,

I'd stay with Amantadine for a little while if it's helping fatigue--that's a good sign. I know it's bad to overmedicate, but perhaps you could try a natural substance for sleep like melatonin or valarian?