I was having similar complications on the omeprazole from time to time, but found that the protonix worked much better without the complications. Though I do agree that speaking with your doctor is best, especially if you have other medical complications or concerns also.
Prevacid, Nexium, Protonix, Aciphex, Zantac, and Pepcid are all used to treat reflux. You can ask you doctor who will know best which one is least likely to cause you dizzyness.