I had a barium esophagram and an upper endoscopy. Findings are: small hiatal hernia with mild gastroesophageal reflux , normal hypopharynx , ring present in GE junction, dilation performed , mild esophagitis in GE Junction - 4 biopsies taken , normal stomach - 4 biopsies taken , normal duodenum . Biopsies negative. I was prescriped Protonix, 40mg daily. Question: Protonix appears to be a medication for hyperchlorhydria. What if I have hypochlorhydria? Should I begin this drug therapy before having a PH diagnostic test to determine my stomach acid levels?