PPIs are pretty difficult to stop taking -- I started taking Prilosec in 2004 for reflux and after a few tries at stopping abruptly resulted in horrid symptoms, I finally manged to tail off by reducing the dose 1/8 at a time every 2 weeks, over a total period of 2 months. From all accounts H2 blockers are easier to quit.

I was pleasantly surprised that I didn't have any heartburn or reflux issues when I was done -- apparently the original cause was gone.