Treatment for Helicobacter pylori Infection

First-line Treatment Options

The American Gastroenterological Association recommends bismuth quadruple therapy as the first-line treatment for H. pylori infection, especially in areas with high clarithromycin resistance, which includes a proton pump inhibitor (PPI) twice daily, subsalicilato de bismuto, metronidazole, and tetracycline for 10-14 days 1
In areas with low clarithromycin resistance, standard triple therapy may still be used, consisting of PPI + clarithromycin + amoxicillin (or metronidazole) for 10-14 days, as recommended by the European Helicobacter Study Group 2, 3
Bismuth-containing quadruple therapy is strongly recommended as first-line treatment in areas with high clarithromycin resistance, according to the American College of Gastroenterology 2, 4, 1

The European Helicobacter Study Group recommends using high-dose PPI (twice daily) to increase treatment efficacy 2, 3
Extending treatment duration to 14 days rather than 7 days can improve eradication rates by approximately 5%, as suggested by the American Gastroenterological Association 2, 3
The American College of Gastroenterology suggests considering adding probiotics as adjuvant therapy to reduce side effects, though evidence for this is limited 2, 3

After failure of first-line therapy, the European Helicobacter Study Group recommends using bismuth quadruple therapy if clarithromycin-based triple therapy failed initially 2, 3
Levofloxacin-based triple therapy (PPI + amoxicillin + levofloxacin) is an alternative second-line option, according to the American College of Gastroenterology 2, 3

The American Gastroenterological Association recommends that antimicrobial susceptibility testing should guide therapy whenever possible after two treatment failures 2, 4, 5
Alternative rescue therapies include rifabutin-based triple therapy, as suggested by the American College of Gastroenterology 4, 1

The American College of Gastroenterology advises avoiding repeating antibiotics to which the patient has been previously exposed, especially clarithromycin and levofloxacin, as resistance is likely to have developed 4, 1
Bismuth is valuable because bacterial resistance to this compound is extremely rare, according to the American Gastroenterological Association 1
The European Helicobacter Study Group recommends confirming eradication after treatment using either urea breath test or a validated monoclonal stool test (not serology) 2