Zero heartburn with just one pill a day!* If you suffer from frequent heartburn, suffer no more. Yes, it is possible with Zegerid OTC acid reducer, the ONLY dual-ingredient, 24-hour treatment for frequent heartburn. Incredibly, an estimated 50 million Americans experience symptoms associated with frequent heartburn, which is heartburn that occurs two or more days a week. Heartburn occurs when acid from the stomach moves up into the esophagus, causing pain and discomfort in your chest and maybe even a bitter taste in your mouth. Why is Zegerid OTC such an effective heartburn medicine? Only Zegerid OTC (not "Zegrid" or "Zegarid") has a unique dual-ingredient formula that contains omeprazole 20mg, the leading prescription stomach acid reducer, PLUS sodium bicarbonate to protect the omeprazole from stomach acid so it can be absorbed by the body and get to work treating frequent heartburn. What is Omeprazole? Omeprazole is the leading prescription acid reducer, which you can get "over the counter" (OTC) with Zegerid OTC. Omeprazole tablets are Proton Pump Inhibitors (PPI). That means the omeprazole 20mg in Zegerid OTC deactivates pumps in the stomach lining to inhibit acid production at the source so it does not move up into the esophagus. When Zegerid OTC is used as directed some people get complete heartburn relief within 24 hours.* *Use as directed for 14 days for treating frequent heartburn. Zegerid OTC may take 1-4 days for full effect, although some people get complete heartburn relief within 24 hours.