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CompletedNCT03980496Updated Jun 10, 2019

Effects of Different Omeprazole Dosing on Gastric pH in Non-variceal Upper Gastrointestinal Bleeding

A Phase 4 interventional study of Omeprazole in Non-variceal Upper Gastrointestinal Bleeding, sponsored by Medical University of Bialystok. Completed at 1 site in Poland. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2019-06-10.

Sponsored by Medical University of Bialystok · Phase 4, Interventional, and Treatment

From the registry’s dates

  • Registered 8 years 8 months after the study started (first participant enrolled Sep 2010, registered Jun 2019).
Phase
Phase 4
Study type
Interventional
Enrollment
50
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
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Study summary

The aim of the study is to identify the best method of omeprazole (OME) application with respect to intragastric pH, cytochrome P450 2C19 (CYP2C19) genotype and phenotype.

Read the detailed description

The patients with non-variceal upper gastrointestinal bleeding (NVUGIB) are prospectively enrolled. After the achievement of endoscopic hemostasis, the patients are randomized to 40-mg intravenous (i.v.) OME bolus injection every 12 h or 8-mg/h continuous i.v. infusion for 72 h after an 80-mg i.v. OME bolus administration. The intragastric pH is recorded for 72 h. The CYP2C19 variant alleles (*2, *3, *17) are analyzed and the serum concentrations of OME and 5-hydroxyomeprazole (5-OH OME) are determined. The diagnosis of Helicobacter pylori infection was based on the results of the rapid urease test performed on stomach mucosa biopsies (antrum and angle) and on the results of the stool antigen test.

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Conditions studied

  • Non-variceal Upper Gastrointestinal Bleeding

Keywords

  • CYP2C19
  • Helicobacter pylori
  • non-variceal upper gastrointestinal bleeding
  • intragastric pH
  • proton pump inhibitor
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In context

Gastrointestinal Hemorrhage

339 studies on the registry are indexed under Gastrointestinal Hemorrhage; 79 are open to participants now.

This study's enrollment of 50 is below the median of 87 across 211 interventional studies indexed under Gastrointestinal Hemorrhage.

Browse Gastrointestinal Hemorrhage studies →

Lead sponsor

Medical University of Bialystok is the lead sponsor of 68 studies on the registry; 17 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • written informed consent must be obtained before any treatment or assessment is performed
  • patients admitted with upper gastrointestinal bleeding (UGIB) symptoms to the Emergency Department of the University Hospital of Bialystok (Bialystok, Poland)

Exclusion criteria

Exclusion Criteria:

  • pregnancy
  • age >90 years
  • lack of written consent
  • recent treatment with certain medications, including PPIs, H2-receptor antagonists (H2RA), antacids, steroids, oral contraceptives, clopidogrel, prasugrel and clarithromycin
  • the presence of variceal UGIB
  • history of surgery of upper gastro-intestinal tract
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Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
50 participants (actual)

Study arms

  • Active comparator
    omeprazole infusion (OI) group

    After successful endoscopic hemostasis, the patients are given an 80-mg i.v. omeprazole bolus. The OI group is then treated with an 8-mg/h continuous i.v. infusion of OME for 72 h.

    Drug: Omeprazole

  • Active comparator
    omeprazole bolus (OB) group

    After successful endoscopic hemostasis, the patients are given an 80-mg i.v. omeprazole bolus. The OB group receives a 40-mg i.v. bolus of OME every 12 h.

    Drug: Omeprazole

Interventions

  • DrugOmeprazole

    Also known as: endoscopic treatment of non-variceal upper gastrointestinal bleeding

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What researchers measure

Primary outcomes

  1. Intragastric pH in non-variceal upper gastrointestinal bleeding patients treated with omeprazole regarding: Percentage of time at pH >4.0 and pH >6.0

    intragastric pH profiles

    Time frame: 72 hours

  2. Intragastric pH in non-variceal upper gastrointestinal bleeding patients treated with omeprazole regarding: pH at specified time after the initial OME 80 mg i.v. bolus

    intragastric pH profiles

    Time frame: 72 hours

  3. Intragastric pH in non-variceal upper gastrointestinal bleeding patients treated with omeprazole regarding: Helicobacter pylori infection

    intragastric pH profiles

    Time frame: 72 hours

  4. Intragastric pH in non-variceal upper gastrointestinal bleeding patients treated with omeprazole regarding: CYP2C19 variant alleles (*2, *3, *17)

    intragastric pH profiles

    Time frame: 72 hours

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Study locations

1 site
  • Department of Gastroenterology and Internal Medicine, Medical University of Bialystok
    Białystok, Podlaskie 15-276, Poland
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References and documents

Publications

  • Chwiesko A, Charkiewicz R, Niklinski J, Luczaj W, Skrzydlewska E, Milewski R, Baniukiewicz A, Wroblewski E, Rosolowski M, Dabrowski A. Effects of different omeprazole dosing on gastric pH in non-variceal upper gastrointestinal bleeding: A randomized prospective study. J Dig Dis. 2016 Sep;17(9):588-599. doi: 10.1111/1751-2980.12393. PubMed 27518195 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 10, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03980496
Lead sponsor
Medical University of Bialystok
Collaborators
National Science Centre, Poland
Responsible party
Sponsor
First posted
Jun 10, 2019
Start date
Sep 9, 2010
Primary completion
Jun 8, 2013
Completion
Jun 8, 2013
Last update
Jun 10, 2019

Study contacts

Andrzej Dabrowski, Prof.
study chair · Medical University of Bialystok
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jun 2019. You cannot join it, but the record below documents what was studied.

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