That said, I think it's sometimes difficult to attribute this side or that to a particular drug when you're on multiple drugs. In your case, since Prilosec
seemed to work, you might take some time off and try it again to see if the symptons return. Alternatively, try Nexium again. Did you take your Nexium an hour before meals? Some say this is important with this particular PPI. Fortunately, there are many PPI's, so if one doesn't work or has certain sides, there's always another to try.