Dose-Effect of S-Tenatoprazole-Na(STU-Na) 30 mg, 60 mg, 90 mg and 120 mg in Healthy Volunteers

Inclusion Criteria: Healthy male volunteers aged 18 to 55 years inclusive Able to understand the nature of the study and to give written informed consent Able to communicate well with the investigator himself or his/her representatives Able not to smoke during each hospitalization Normal physical examination at the screening visit Body Mass Index between 18 kg/m² and 35 kg/m² at the screening visit Normal blood pressure and heart rate measured under standardized conditions at the screening visit after at least 5 minutes of rest in a supine position: SBP within 90 and 140 mmHg, DBP within 40 and 85 mmHg, and HR within 40 to 85 bpm Normal 12-lead electrocardiogram at screening visit recorded after at least 5 minutes of rest: PR within 120 and 200 ms, QRS below or equal to 120 ms, and QTc below or equal to 440 ms Laboratory results within the normal ranges or considered not being of clinical relevance by the investigator Exclusion Criteria: Vegetarians Positive to H. pylori by 13C urea breath test or stool antigen test at screening visit Contra-indication to proton pump inhibitors treatment Previous participation in a trial with PPIs within 3 months Current or historical evidence of clinically relevant cardiovascular, neurological, hematological, hepatic, gastrointestinal, renal, pulmonary, endocrinological, metabolic or psychiatric disease Any other acute or chronic disease which could influence the volunteer's health and/or the study results Presence or history of malabsorption or any gastrointestinal surgery except appendectomy or hernia repair Receipt of medication (including 'over the counter' preparations) within two weeks of dosing Use of enzyme inducers or enzyme inhibitor drugs within the last three months before the first drug administration Participation in a clinical trial involving receipt of a licensed (marketed) medicinal product or of an unlicensed (investigational) medicinal product within one month before the study Past or current drug exposure amounting to drug abuse or addiction Past or current alcohol exposure amounting to alcohol abuse or addiction; (i.e. > 28 units per week for males, where 1 unit = one measure of spirit (25 mL), one glass of wine (125 mL) or ½ pint beer) Currently smoke >10 cigarettes per day Donation of blood or any other major blood loss (>500 mL) within three months before the study Unwilling or unable to comply with the study protocol for any reason or in the opinion of the investigator should not participate in the study Positive test for hepatitis B surface antigen, hepatitis C antibody, HIV1 or HIV2 antibody at screening Known allergy or intolerance to lactose Known allergy or intolerance to any other compound in the study drug or any other closely related compound