Optimized-dose Amoxicillin Versus Standard-dose Amoxicillin for Quadruple Therapy in Helicobacter Pylori Eradication

Study Overview
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Brief Summary
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The goal of this prospective randomized clinical trial is to compare the rate of Helicobacter Pylori (HP) eradication after standard or dose-optimized amoxicillin quadritherapy in patients naïve to any anti-HP treatment and with chronic HP infection documented by histological examination. The main questions it aims to answer are: compare the eradication rate of H.Pylori after a standard concomitant quadritherapy with 2g of amoxicillin versus an optimized quadritherapy with 3g of amoxicillin, in Tunisian population Identify different factors associated with poor therapeutic response Patients were randomly assigned to either standard quadruple therapy (Qs-14: amoxicillin 1g twice daily, clarithromycin 500mg twice daily, metronidazole 500mg twice daily and esomeprazole 40mg twice daily for 14 days), or optimized quadruple therapy (Qo-14: amoxicillin 1g three times a day, clarithromycin 500mg twice daily, metronidazole 500mg twice daily and esomeprazole 40mg twice daily for 14 days). Eradication control was performed by urea breath test.

Detailed Description
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This study was a prospective, randomized, single-center study conducted in the hepato-gastroenterology department of Mahmoud Matri Hospital in Ariana, in collaboration with the bacteriology and biochemistry laboratory of the same hospital, the anatomopathology department of Abderrahmen Mami Hospital in Ariana, and the private clinical analysis laboratory Fendri. all patients aged from 18 and 65 years-old with H. pylori infection documented by pathological examination of per endoscopic gastric biopsies were recruited. This was a population of patients who had undergone upper endoscopy (UE) and in whom the search for H.Pylori was indicated, according to the European Maastrich IV recommendations. Eligible subjects were randomly assigned in a 1:1 ratio to receive either standard quadruple therapy (Qs-14) including : amoxicillin 1g twice daily ,clarithromycin 500mg twice daily ,metronidazole 500mg twice daily and esomeprazole (Medis Pharmaceutical Company) 40 mg twice daily for 14 days, or optimized quadruple therapy (Qo-14) including : amoxicillin 1g three times daily ,clarithromycin 500mg twice daily, metronidazole 500mg twice daily and esomeprazole 40 mg twice daily (Medis Pharmaceutical Company) for 14 days. Eradication control was performed by 13C-UBT at least 4 weeks after the end of the treatment.

Official Title
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Prospective Randomized Trial: Comparison Between Optimized-dose Amoxicillin and Standard-dose Amoxicillin for Quadruple Therapy in the Treatment of Helicobacter Pylori Infection in Tunisian Patients

Conditions
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Helicobacter Pylori

Intervention / Treatment
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* Drug: optimized quadruple therapy
* Drug: standard quadruple therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: H. pylori infection documented by pathological examination of per endoscopic gastric biopsies. Exclusion Criteria: Previously received H.Pylori eradication therapy. Known allergy to one of the components of the kit used (Helikit) for 13C-urea breath test (UBT). A contraindication to 13C-UBT. Allergy or contraindication to the following antibiotics: Amoxicillin, Clarithromycin, Metronidazole and quinolones. Received antibiotics during the four weeks, or proton pump inhibitors (PPIs) during the two weeks prior to inclusion in the study. A history of bariatric surgery. Active gastro intestinal bleeding. Severe comorbidity such as decompensated cirrhosis, end-stage renal disease, decompensated cardiac disease and neoplastic disease. Patients on long-term immunosuppressive or corticosteroid therapy at a dose greater than 20mg/day. Pregnant or lactating women.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: optimized quadruple therapy (Qo-14)<br>patients allocated to experimental group receive an optimized quadruple therapy (Qo-14) including 3 grams of Amoxicillin plus standard dose of clarithromycin, metronidazole and esomeprazole for 14 days. | Drug: optimized quadruple therapy<br>* Association of amoxicillin 3 g/day + Esomeprazole, nitroimidazole and clarithromycin for 14 days<br>* Other names: Qo-14;|
| Active Comparator: standard quadruple therapy (Qs-14)<br>patients allocated to this group receive standard quadruple therapy (Qs-14) including : amoxicillin 1g twice daily ,clarithromycin 500mg twice daily ,metronidazole 500mg twice daily and esomeprazole 40 mg twice daily for 14 days | Drug: standard quadruple therapy<br>* Association of amoxicillin 2 g/day + Esomeprazole, nitroimidazole and clarithromycin for 14 days<br>* Other names: Qs-14;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| HP eeradication rate | Urea Breath test (UBT) is performed no sooner than 6 weeks after completion of H pylori therapy. Use of PPIs should be discontinued for at least 2 weeks before administration of the UBT. | 6 weeks after treatment completion | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| prevalence of adverse reactions | The percentage of patients reporting side effects during treatment and the following days until the evaluation of Hp eradication | 6 weeks after treatment completion | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Disease Eradication