A Study to Compare the Pharmacokinetic Characteristics of CJ-12420

Inclusion Criteria: * Healthy male aged 19 to 45 years at the screening * Subject who is over 50kg with BMI between 19 kg/m2 to 28 kg/m2 (inclusive) * Subject who fully understood after being informed detailed description of clinical trial, written informed consent voluntarily to observe the precautions. Exclusion Criteria: * Subject who fall under the criteria below in laboratory test. * AST, ALT, ALP, GGT, total bilirubin, BUN, creatinine \> UNL x 1.5 * Subject who with low blood pressure with clinical significance at screening test. * (systolic blood pressure is less than 90 mmHg or over 140 mmHg, and diastolic blood pressure is less than 50 mmHg or over 90 mmHg) * Subject who has a medical history of symptomatic GERD, erosive esophagitis or duodenal ulcer, gastric ulcer, barrett's esophagus or zollinger-ellison syndrome.