Proton pump inhibitors (PPIs) are a class of drugs used to treat GERD, peptic ulcers, and H. pylori . Examples of PPIs include Prilosec, Prevacid, Aciphex, Protonix, Nexium, and Zegarid. Common side effects are headache, diarrhea, constipation, vomiting, intestinal gas, fever, nausea, and rash. More @Wikipedia
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