Primary object: Evaluate Pharmacodynamic property and safety administered S-pantoprazole 10, 20, 40mg and Pantoprazole 20, 40mg in healthy male subjects

Secondary object : Evaluate Dose-response of S-pantoprazole and pantoprazole and compare each dose-response

Inclusion Criteria:

• Adult healthy males 20 to 45 years at screening
• BMI : 19kg/m2 ~ 26 kg/m2
• Blood Pressure : "140 mmHg ≥ sitting SBP ≥ 90 mmHg, 95 mmHg ≥ sitting DBP ≥ 50 mmHg"

Exclusion Criteria:

• Have history of significant hepatic, renal gastrointestinal, pulmonary, musculoskeletal, endocrine, neuropsychiatric, hematologic, cardiovascular diseases
• Have a gastrointestinal disease(ex : Crohn's disease, gastrointestinal ulcer) or surgery (except for Appendectomy, hernia repair) affected the absorption of medications
• Have history of GERD, Gastric ulcer, Duodenal ulcer and H.pylori positive
• Hypersensitivity reactions to drugs of clinically significant hypersensitivity reactions in the history of benzimidazole (ex: pantoprazole, NSAID, antibiotic)
• Have a history of drug abuse
• unusual diet affected the absorption, distribution, metabolism, excretion of medications
• Subject who treated with any investigational drugs within 90 days before the administration of investigational drug
• Subject who takes inhibitors and inducers of drug metabolizing enzyme (Barbiturates etc.) within 30days
• Previously donate whole blood within 60 days or component blood within 30 days or transfusion within 30 days
• Subject who have taken habitually caffeine (caffeine > 5 units/day)
• Subject who have drunken habitually (alcohol > 21 units/week, 1 unit = pure alcohol 10ml)or who are unable to quit drinking during this study or smoker
• Subjects deemed ineligible by investigator based on other reasons