I don't know if it's related or not, but after I had GB surgery I felt EXTREMELY nauseous. I had to tell the nurse I was feeling like I was going to throw up and she gave me some gravol through my IV which helped alot--for a few hours. Afterwards when I was home I still felt horrible for a few days afterwards. I have had surgery before and never felt as bad as I did then. So I'm guessing it could be related to my gastritis (which I was diagnosed with through an endoscopy a few months before the GB surgery)