Frequent heartburn is the most common symptom of gastroesophageal reflux disease (GERD), a condition in which stomach acid backs up into the esophagus. Medications called proton pump inhibitors (PPIs, such as Nexium, Prilosec, Prevacid, and Aciphex) and H2 receptor blockers such as Pepcid and Zantac), are often very effective at …
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