Monitor liver enzymes in patients w/ severe liver impairment. Discontinue if liver enzymes increase. Patients >65 yr old, w/ history of gastric/duodenal ulcer or upper GI bleeding. Patients w/ reduced body stores or risk factors for reduced vit B12
absorption due to hypo- or achlorhydria. Exclude possibility of malignancy of gastric ulcer or malignant disease of the esophagus prior to treatment. Pregnancy & lactation. Childn.