Lansoprazole (pronounced lænˈsoʊprəzoʊl lan-soh-prə-zohl, INN) is a proton-pump inhibitor (PPI) which prevents the stomach from producing gastric acid. It is manufactured by a number of companies worldwide under several brand names (some brand names include: Prevacid, Helicid, Zoton, Inhibitol, Monolitum). It was first approved by the U.S. Food and Drug Administration (FDA) in 1995. Prevacid patent protection expired on November 10, 2009. As a result, prescription Lansoprazole is now available in the form of a generic drug. As of November 12,