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