I am not sure why your doctors have not been able to control the nausea, and I think this is something that you should pursue with others besides them, perhaps a gastroenterologist. But from my own experience with a PEG, I found that the rate of drip determined whether or not it would make me nauseous. After cutting my 2 cans of Ensure with a third of plain water I would set my drip so that the time for the bag to empty was about 90 minutes. It was imperative that I was sitting upright while using the system as well. If I did not do both of these things