HI...not being drs here, that is not a question we can answer..
.....there is a expert forum that the dr may be better able to answer that...this is a support forum we share info from past experience....
http://www.medhelp.org/forums/Gastroenterology/show/107
Please try the expert forum and let us know what u find out.
.....as far as rebound, u will experience some acid reflux as u back off meds, but try to step down slowly a little at a time....May I ask, were u also on antibiotics?
Good luck
"selma"