<unk> (oral) is a proton pump inhibitor that is FDA approved for the treatment of erosive esophagitis due to acid-mediated GERD, Zollinger-Ellison Syndrome.   Common adverse reactions include abdominal pain, constipation, diarrhea, flatulence, nausea, xerostomia, headache, somnolence.
Esomeprazole 
Rabeprazole
Omeprazole
Lansoprazole
Pantoprazole 
Hexetidine
Metoclopramide 
Bismuth subsalicylate