Hello and thank you for your question. There are several combinations of drugs that can be used to treat H. pylori. The regimen most commonly recommended for first line treatment of H. pylori is triple therapy with a proton pump inhibitor like omeprazole, amoxicillin (1 g twice daily), and clarithromycin (500 mg twice daily) for 7 to 14 days. There are some regimens that use tetracycline, but they often require 4 medications instead of the 3 listed above. A typical regimen for H. pylori treatment would include tetracycline, a proton pump inhibitor, bismuth and metronidazole. Doses for these regimens are high and the course is often 2 weeks. She may need to see a gastroenterologist to get adequate treatment. I do not think that tetracycline alone will be sufficient. Thank you for using HCM.