DrugLib.com — Drug Information Portal

Rx drug information, pharmaceutical research, clinical trials, news, and more

Amoxicillin/Metronidazole Based Quadruple Therapy for Helicobacter Pylori Eradication

Information source: Shanghai Jiao Tong University School of Medicine
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Dyspepsia; Peptic Ulcer

Intervention: Lansoprazole (Drug); Bismuth Potassium Citrate (Drug); Amoxicillin (Drug); Metronidazole (Drug); Clarithromycin (Drug)

Phase: Phase 4

Status: Completed

Sponsored by: Shanghai Jiao Tong University School of Medicine

Official(s) and/or principal investigator(s):
Hong Lu, M.D., Principal Investigator, Affiliation: Renji Hospital, Shanghai Jiao-Tong University School of Medicine


No trial has examined the the efficacy of amoxicillin and metronidazole based quadruple therapy for Helicobacter pylori treatment. The study aims to compare the effectiveness and safety of 14-day amoxicillin-/metronidazole-based quadruple regiment and classical quadruple regiment for Helicobacter pylori eradication.

Clinical Details

Official title: Prospective, Randomized Controlled Trial Comparing Amoxicillin and Metronidazole Based Bismuth-containing Quadruple Therapy With Amoxicillin and Clarithromycin Based Quadruple Therapy for First-line Helicobacter Pylori Eradication

Study design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Primary outcome: Eradication rate of Helicobacter pylori

Secondary outcome: Frequency of side effects of each treatment

Detailed description: Helicobacter pylori is the most successful human pathogen infecting an estimated 50% of the global population. It is a common and potentially curable cause of dyspepsia and peptic ulcer disease. Eradication in patients with peptic ulcer or even functional or non-investigated dyspepsia is a cost effective approach. Most Consensus Conferences and Clinical Guidelines recommend the prescription of a triple therapy including a proton pump inhibitor (PPI) and clarithromycin with either amoxicillin or metronidazole, as first-line treatment. However, the effectiveness of these triple-therapy regimens seems to have diminished over time, largely as a result of emerging resistance of the organism to clarithromycin. Due to the low efficacy achieved with these treatments, they have been deemed as unethical comparators in clinical trials. As antimicrobial resistance becomes more prevalent worldwide, treatment failure rates are likely to continue increasing, suggesting that new regimens for H pylori eradication must be sought. Bismuth-containing quadruple therapies have been used widely in H. pylori therapy with many permutations of doses and durations and with variable results. Classical bismuth-based quadruple therapy containing a PPI, bismuth, tetracycline and metronidazole has been recommended as the first-line treatment by the Maastricht IV Consensus Conference report and H. pylori Study Group of Chinese Society of Gastroenterology. But this regiment has high rate of side effects because of tetracycline. Standard triple therapy-based, bismuth-containing quadruple Therapy is also an alternative. Though addition bismuth and prolonging treatment duration can overcome H. pylori resistance to clarithromycin, its use as a first-line treatment is limited in areas of high clarithromycin resistance. Amoxicillin has low resistance rate as well as low percentage of side effects. The combination of amoxicillin and metronidazole in bismuth-containing quadruple therapy may be a better choice, which can avoid clarithromycin resistance and reduce side effects. Therefore, we will do a randomized trial to compare the eradication rate of 14-day amoxicillin and metronidazole based bismuth-containing quadruple therapy with amoxicillin and clarithromycin based quadruple therapy for Helicobacter pylori infection.


Minimum age: 18 Years. Maximum age: 75 Years. Gender(s): Both.


Inclusion Criteria:

- Participants with non-investigated/functional dyspepsia or scarred peptic ulcer with

indication of H pylori eradication treatment

- Ability and willingness to participate in the study and to sign and give informed


- confirmed H pylori infection by at least one of the following methods: C13-urea

breath test, histology, rapid urease test or bacterial culture. Exclusion Criteria:

- patients with peptic ulcer

- previous H. pylori eradication therapy

- Age below 18 years

- major systemic diseases

- previous gastric surgery

- pregnancy or breastfeeding

- allergy to any of the study drugs

- receipt of anti-secretory therapy, antibiotics or bismuth salts 4 weeks prior to


Locations and Contacts

Shanghai Renji Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, Shanghai 200127, China
Additional Information

Related publications:

Malfertheiner P, Megraud F, O'Morain CA, Atherton J, Axon AT, Bazzoli F, Gensini GF, Gisbert JP, Graham DY, Rokkas T, El-Omar EM, Kuipers EJ; European Helicobacter Study Group. Management of Helicobacter pylori infection--the Maastricht IV/ Florence Consensus Report. Gut. 2012 May;61(5):646-64. doi: 10.1136/gutjnl-2012-302084.

Sun Q, Liang X, Zheng Q, Liu W, Xiao S, Gu W, Lu H. High efficacy of 14-day triple therapy-based, bismuth-containing quadruple therapy for initial Helicobacter pylori eradication. Helicobacter. 2010 Jun;15(3):233-8. doi: 10.1111/j.1523-5378.2010.00758.x.

Lu H, Zhang W, Graham DY. Bismuth-containing quadruple therapy for Helicobacter pylori: lessons from China. Eur J Gastroenterol Hepatol. 2013 Oct;25(10):1134-40. doi: 10.1097/MEG.0b013e3283633b57. Review.

Starting date: July 2014
Last updated: February 2, 2015

Page last updated: August 23, 2015

-- advertisement -- The American Red Cross
Home | About Us | Contact Us | Site usage policy | Privacy policy

All Rights reserved - Copyright DrugLib.com, 2006-2017