4 PPIs: Nexium,
Prevacid, Aciphex, Protonix; 2 H2blockers:
Zantac and Pepcid; 2 antiacids: Gaviscon and Riopan. I couldn't take any of these more than a few days (from 1 to 13 days) because of their side effects.
The 2 bad side effects I've most often had are:
worsened IBS - bad abdominal cramps (caused by Nexium together with fever and Zantac)
a white-coated and burning tongue (caused by Prevacid, Zantac, Protonix, Pepcid, Riopan).