Until reading that link, all of my doctors made Gabapentin sound safe and effective. I was diagnosed with PN(likely Parsonage Turner Syndrome) 6 months ago a month before ACDF level 2 surgery. Started at 300mg, 900mg, ramped up to 1800 and 3 weeks ago increased to 2400 mg/day. My skin is red and rashy and I've had diarrehea almost everyday for the past 3 weeks and before I had very regular healthy bowel movements. I have severe pain in my very little relief. My neurologist suggested that I go to Mayo for further evaluation so I guess he has nothing more to offer in confirming my diagnosis? What can Mayo offer?