Overview CYP2C19 Genotype Predictor of Gastric Acid Suppression Status: Withdrawn Trial end date: 2016-11-01 Target enrollment: Participant gender: Summary If CYP2C19 genotype can predict the efficacy of healing erosive esophagitis and gastric acid secretion in patients taking once a day omeprazole. Phase: Early Phase 1 Details Lead Sponsor: Mayo ClinicTreatments: Omeprazole