The current advocated quadruple dosing for H. pylori is one proton pump inhibitor + two antibiotics + one bismuth agent. 1. Proton pump inhibitor (PPI): omeprazole, rabeprazole, esomeprazole, lansoprazole, epprazole, etc. 2. Antibiotics: Amoxicillin, Metronidazole, Clarithromycin, Levofloxacin, Furazolidone, Tetracycline, etc. As antibiotic resistance varies from place to place, the choice of antibiotics should depend on the local situation. 3. Bismuth: bismuth potassium citrate, bismuth pectin, etc. If you find yourself infected with Helicobacter pylori, you should go to the hospital in time to avoid delaying your condition.