Question

A 55-year-old man has newly diagnosed H. pylori. He previously took doxycycline intolerance. No susceptibility is available. Which component must NOT be substituted in bismuth quadruple therapy?

Accepted Answer

Do not substitute tetracycline with doxycycline

Answer

Avoid bismuth due to intolerance

Answer

Replace metronidazole with amoxicillin

Answer

Use PPI only

Answer

Shorten duration to 7 days

Practice question

A 55-year-old man has newly diagnosed H. pylori. He previously took doxycycline intolerance. No susceptibility is available. Which component must NOT be substituted in bismuth quadruple therapy?