I was told I had autonomic problems. Based on my autonomic testing they found cholinergic neuropathy. Nothing was explained to me. I was just told that it was part of my SFN. I never really thought about it beyond autonomic problems. I can't find much on it. Yesterday I started to have itchy eyes and a bit of a sore throat. I have pretty rough nights as it is, so I figured I would try Nyquil (doxylamine). I looked up the drug so I could see if it would interact with my muscle relaxer if I were to need that for a muscle spasm, and instead I came across the term "anti cholinergic". Now I am even more confused about my diagnosis.