Helicobacter Pylori First-line Treatment Containing Tetracycline in Patients Allergic to Penicillin

Helicobacter Pylori First-line Treatment Containing Tetracycline in Patients Allergic to Penicillin:a Prospective Randomized Controlled Study

The purpose of this study is to assess and compare the effectiveness of levofloxacin-tetracycline -containing and metronidazole-tetracycline-containing quadruple regimens for the primary treatment of Helicobacter pylori infection in patients allergic to penicillin.

Helicobacter pylori(H.pylori), which infects about 50% of the global population, has been recognized as a main risk factor of multiple gastric pathologies, especially non-cardiac gastric cancer. Strongly evidence supports that H.pylori eradication is an effective approach to reduce the incidence of those pathologies.However,Helicobacter pylori eradication is a challenge in patients allergic to penicillin. Therefore, the investigators aim to assess and compare the effectiveness of levofloxacin-tetracycline -containing and metronidazole-tetracycline-containing quadruple regimens for the primary treatment of Helicobacter pylori infection in patients allergic to penicillin.

Inclusion Criteria:

• Patients aged 18-70 with H. pylori infection.
• Patients Allergic to Penicillin.

Exclusion Criteria:

• Patients with previous H. pylori eradication therapy.
• Patients treated with Histamine-receptor antagonist, proton pump inhibitor, bismuth and antibiotics in the previous 4 weeks.
• Patients with gastrectomy, acute gastrointestinal bleeding and advanced gastric cancer.
• Patients with known or suspected allergy to study medications.
• Currently pregnant or lactating.
• Inability to provide informed consent