A drug that reduces the amount of acid made in the stomach. It is used to treat stomach ulcers, gastroesophageal reflux disease (a condition in which acid from the stomach causes heartburn), and conditions in which the stomach makes too much acid. Lansoprazole is a type of proton pump inhibitor (PPI). Also called Prevacid.
( lan-SOH-pruh-zole )
Source: NCI Dictionary of Cancer Terms
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