I have stomach problems and some meds affect me the same way. I have GERD, PUD and also aerialaxal volvoulus of the stomach. This is where your intestines are twisted.

Could you be dealing with any of these problems. My gallbladder is gone too so it's not that but there are some meds that I belch up an awlful taste from.

I'm on Methadone and it doesn't do it to me but I just quit the Flexeril again because it was tearing my stomach up even with Prevacid. It could be the Flexeril.

Ada