Hi :-)
I don't think its ever used for autonomic problems , no.
I have only been diagnosed with peripheral neuropathy but they don't know why I have it, and the burning and pain everywhere but my head.
Used to get insane pressure in my tailbone area, have had the bladder burning and urgency for years off an on. I had the urodynamics test done..it empties completely but doesn't feel like it to my brain.
I have mod-sev bi lateral carpel tunnel , and abnormalities in my nerve conduction study in my feet as well. They burn often.
I've had all tests done , like ultrasounds, STD tests ( for pelvic pain and burning ), had a laparoscopy to remove endometriosis which did not improve the pain. I suspect it has to do with my spine. I've had an MRI on my brain and I do not have MS.
Just wish I had an answer, or at least a way to help the bladder issue. I've been on Detrol and another medication used for incontinence but it didn't help.

Thanks so mucn for trying/listening