Furadantin Aciphex is a prescription drug that is categorized under a group of medications known as proton pump inhibitors. Aciphex is indicated for symptoms of gastroesophageal reflux disease (GERD) in adults and children aged 1 year and above. Aciphex is also used in adults to treat conditions associated with high levels of stomach acid including Zollinger-Ellison syndrome. Aciphex can promote the healing of erosive esophagitis, a condition characterized by the damage of the esophagus caused by stomach acid. Aciphex can be combined with an antibiotic to prevent gastric ulcer brought about by helicopter pylori. Aciphex works by reducing the amount of acid produced by the stomach.