Comparison of the effects of immediate-release omeprazole powder for oral suspension and pantoprazole delayed-release tablets on nocturnal acid breakthrough in patients with symptomatic gastro-oesophageal reflux disease.
BACKGROUND
Many patients treated with a proton-pump inhibitor for gastro-oesophageal reflux disease or erosive oesophagitis still have substantial night-time gastric acidity. A previous trial of a new immediate-release omeprazole oral suspension suggested that nocturnal gastric acidity could be more effectively controlled with a bedtime dose of immediate-release omeprazole than with a delayed-release proton-pump inhibitor administered before dinner or at bedtime.


OBJECTIVE
To compare the ability of immediate-release omeprazole with pantoprazole to control nocturnal gastric acidity, when they were dosed once daily and twice daily.


METHODS
Thirty-six patients with nocturnal gastro-oesophageal reflux disease symptoms received immediate-release omeprazole and pantoprazole in this open-label, randomized-crossover trial. Median gastric pH, the percentage of time with gastric pH > 4 and the percentage of patients with nocturnal acid breakthrough, were evaluated with 24-h pH monitoring.


RESULTS
Repeated once daily (bedtime) dosing with immediate-release omeprazole suspension produced significantly better nocturnal gastric acid control than repeated once daily (predinner) or twice daily (prebreakfast and bedtime) dosing with pantoprazole delayed-release tablets (median pH: 4.7 vs. 2.0 and 1.7; percentage of time pH > 4: 55 vs. 27 and 34; nocturnal acid breakthrough: 53 vs. 78 and 75). Twice daily dosing (prebreakfast and bedtime) with immediate-release omeprazole 20 and 40 mg achieved the best night-time control of gastric acidity. Repeated once daily bedtime dosing with immediate-release omeprazole 40 mg and twice daily dosing with pantoprazole 40 mg gave similar 24-h pH control. No safety issues were associated with either drug in this trial.


CONCLUSIONS
Dosed once daily at bedtime, immediate-release omeprazole reduced nocturnal gastric acidity to a degree not observed with once daily dosing of delayed-release proton-pump inhibitors.
Castell
D
D
Esophageal Disorders Program, Medical University of South Carolina, Charleston, SC, USA.
Bagin
R
R
Goldlust
B
B
Major
J
J
Hepburn
B
B
D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000368:Aged; D000897:Anti-Ulcer Agents / Q000008:administration & dosage*; D001562:Benzimidazoles / Q000008:administration & dosage*; D018592:Cross-Over Studies; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D005260:Female; D005764:Gastroesophageal Reflux / Q000188:drug therapy*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage* / Q000031:analogs & derivatives*; D000077402:Pantoprazole; D011208:Powders; D013454:Sulfoxides / Q000008:administration & dosage*; D016896:Treatment Outcome
D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents; D001562:Benzimidazoles; D011208:Powders; D013454:Sulfoxides; D000077402:Pantoprazole; D009853:Omeprazole