Nexium is a prescription drug used to treat gastroesophageal reflux disease (GERD), where buy generic nexium without rx acid reflux, and other conditions. It may also be used to lower the risk of cancer in people with chronic stomach inflammation. where buy generic nexium without rx is an antacid that lowers the amount of acid released by your stomach and helps protect the esophagus from stomach acid. It is meant for long-term use only.