This protocol addresses patients with peptic ulcer disease and active Helicobacter pylori infection who are treatment-naive (no prior H. pylori eradication therapy) and have a documented true penicillin allergy. This specific combination of factors narrows the range of appropriate first-line options considerably.
Among the standard first-line regimens recommended for treatment-naive H. pylori infection, only one option remains appropriate when a true penicillin allergy is present. The allergy constrains regimen selection at the outset, making recognition of this history essential before initiating eradication therapy.
The approach involves a bismuth-based quadruple regimen — a combination of agents used over a defined course — selected specifically because it avoids penicillin-class antibiotics. The complete regimen, including all components and their duration, is detailed in the full protocol.
Successful treatment is defined as confirmed eradication of H. pylori, verified by a negative urea breath test, fecal antigen test, or biopsy-based test performed at least 4 weeks after completing therapy.