My signs when I first went on PD were all in lab tests, but when I had my residual drop off and PD wasn't enough, the main symptom was that my stomach was on a hair trigger. I'd be walking the dogs, and pause to puke; I kept a bag in my desk "just in case" (and used it); and I remember opening the door at a stoplight and heaving onto the pavement. By the time I was in the hospital, I could not keep food down. My doc transitioned me to hemo and told me "if your symptoms are uremia, your symptoms will reverse quickly". He was right - I have had no trouble keeping food down since the transition.