Lansoprazole is used to treat certain conditions where there is too much acid in the stomach. It is used to treat duodenal and gastric ulcers, gastric ulcers caused by NSAID use, erosive esophagitis, and gastroesophageal reflux disease (GERD).It is commonly used for the diagnosis or treatment of esophageal mucosal injury, gastrin-secreting tumor . It has some side effects such as Atrophic gastritis,Diarrhea,Dizziness,Blurred vision.