Dysautonomia in the gut/gastro system? Hypersensitivity to medication in Dysautonomia Discussion Posted June 11 · Report reply Not a lot of people realize that about 99% of out digestive tract has a 2nd autonomic nervous system completely separate from the rest of the body. So someone can have Gastroparesis or intestinal motility problems without having any other form of Dysautonomia. If you join the some groups on Facebook for it you see it is actually pretty common. For POTS I believe about 25% have different levels of gastroparesis (Too slow stomach motility) And about 15% have dumping syndrome (which is too fast motility). So that’s about 40% but not 100%.