The U.S. Food and Drug Administration has received and is reviewing new safety data about two popular heartburn medications -- Prilosec (omeprazole) and Nexium (esomeprazole). On May 29, 2007, AstraZeneca, the manufacturer of Prilosec (omeprazole) and Nexium (esomeprazole), sent FDA and other regulatory authorities world-wide their preliminary review of new data from two small long-term clinical studies in patients with severe gastroesophageal reflux disease (GERD).
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