What I found...
The current standard first-line treatment in the US (per the 2024 American College of Gastroenterology guidelines) is 14 days of optimized bismuth quadruple therapy, not the old “triple therapy” that many people still remember.
H. pylori is a common stomach bacterium. Once confirmed with an active infection test (urea breath test, stool antigen, or biopsy—not just a blood antibody test), treatment is recommended because it can cause ulcers, chronic gastritis, and raises the long-term risk of stomach cancer.
Preferred first-line regimen (treatment-naïve):
A proton pump inhibitor (PPI) such as omeprazole, pantoprazole, or lansoprazole — twice daily
Bismuth (subsalicylate/Pepto-Bismol or subcitrate) — four times daily
Tetracycline 500 mg — four times daily (doxycycline is not an acceptable substitute)
Metronidazole 500 mg — three or four times daily
This is often given as the combination product Pylera plus a separate PPI. Duration is 14 days. This regimen is preferred because clarithromycin resistance is now high enough in most of North America that the old PPI + clarithromycin + amoxicillin triple therapy frequently fails when used empirically.
You now know more about H. pylori treatment than you ever wanted to know, short of actually having it as you did. My sympathies.