Prevacid is the brand name of the drug, lansoprazole. Lansoprazole is used to lower the amount of acid in your stomach. Prevacid treats conditions for intestinal ulcers, erosive esophagitis, and Zollinger-Ellison syndrome. They do warn that Prevacid should not be taken to relieve heartburn. Heartburn can sometime be confused with beginning stages of precaution. Please take precaution and if you have signs of a heart attack such as heavy breathing and pain throughout your arm. Acid build up can cause heartburn and Prevacid acts to stop it before it starts. You can conveniently pick up Prevacid at a convenient store or at a grocery store. Get the relief you need for less, here!