Comparison of the Effect of Rabeprazole 50 mg DDR Capsules and 20 mg Enteric-coated Tablets

Inclusion criteria

• Diagnosis of GERD with symptoms (i.e. regurgitation, pyrosis) at least 1 or more episodes a week.
• Age ≥ 18 years and <65 years
• Helicobacter pylori (an infection) negative
• Have a body mass index (BMI) between 18 and 33 kg/m²
• pH>4 gastric exposure <25% on a 24-hour dual pH channel monitoring study performed prior to screening (normal intragastric pH +2SD)
• Pathologic intraesophageal acidity exposure (DeMeester score >14.75 and/or >4% of pH<4 (at least 21 hours measured)

Exclusion criteria

• Patiets with Barrett's stricture, gastric outlet obstruction, malignancy, gastrointestinal system bleeding or any other upper gastrointestinal system pathology.
• Patients whose Hiatus hernia is > 3 cm.
• Patients with uncontrolled or insulin dependent diabetes mellitus, symptomatic gallbladder stone, active or unhealed stomach or duodenum ulcer, Zollinger-Ellison syndrome, primary esophagus motility disorder, pancreatitis, inflammatory bowel disease, severe lung disease, chronic liver disease, uncontrolled kidney impairment, cancer (except skin cancer except melanoma), cerebrovascular disease, epilepsy.
• Patients with history of heart failure, ventricular tachycardia, ventricular fibrillation, cardiac arrest, Torsades de pointes, bradycardia, sinus node dysfunction, heart attack, long QTc (>450 ms for male, >470 ms for female patients).
• Patients taken PPIs or H2-blockers within 7 days and prokinetic drugs within 3 days before entering the study.
• Patients with major psychiatric disease.
• Alcoholism and drug use.
• Patients with pathologic laboratory tests; hemogram, sedimentation, CRP, thyroid functions tests, liver enzymes.
• Malabsorbtion.
• Immunosuppressive patients.
• Patients taken cortisone.
• Patients taken other drugs that prolong QT interval.
• Patients taken drugs that need gastric acid for optimal absorption; ketoconazole, iron salts, digoxin, ampicillin esters, anticoagulants, antineoplastic agents, prostaglandin analogues, sukralfat.
• Pregnancy or breast-feeding.
• Patients taken drugs that may affect gastrointestinal system motility or acid release.
• History of abdominal surgery (hysterectomy, abdominal hernia repair, caesarean cases may be included; cholecystectomy have to be excluded).
• Patients taken NSAII drugs (paracetemol may be used up to 2 gr/day).
• Patients taken antidepressants.
• Hypersensitivty to study drugs.
• Known allergy to peanut and soy.