buying nexium tablets is a brand of the prescription drug esomeprazole magnesium, buying nexium tablets used in combination with antibiotics to treat stomach ulcers before too much damage occurs and to prevent them from coming back. It may also be used alone or with antibiotics to treat ulcers caused by the bacteria H. pylori; duodenal ulcer; certain conditions that have caused your stomach to produce too much gastric acid (including Zollinger-Ellison syndrome); or surgery of your stomach or intestines