If you had prednisone issues in your stomach, it usually is in the form of an upset stomach, like gas, reflux, or fast-emptying diarrhea. Prednisone works better if you eat something with it, and my doctor had me taking Prilosec OTC daily to keep from having stomach issues.
I wouldn't think upper right abdomen would be stomach-related, but it is where the gallbladder is located. I had this issue about
3 yrs after Lupus dx -- ended up I had several gallstones & had my gallbladder removed. No issues since.
My suggestion would be to see your doctor!
Hope you feel better soon,
Lynnwood, Lupus & Sjogren's ModeratorDIAGNOSING-LUPUS & LUPUS-RESOURCES
"Life is far too important to be taken seriously" - Oscar Wilde