Patricia: You're absolutely right. When a person with an ulcer is found to be infected by Helicobacter Pylori, the ulcer can be cured by a regimen of antibiotics combined with H-2 blocker or proton-pump blocker. The infection can be detected by a biopsy of the stomach or by a blood test for antibodies (but the antibodies can remain positive, so the blood test is not good for checking if someone is cured of the bug). The reason I didn't mention this in this case is that H-2 blockers work very well at healing ulcers and I just wanted to make a point about these medications without throwing in new therapies. Unfortunately, the most successful antibiotic regimen for H. pylori includes flagyl (metronidazole), which is somewhat contraindicated in breastfeeding anyway. The regimen which is not quite as effective includes biaxin (clarithromycin) and prilosec, which is the drug in question in the first place. Let me know if you want any more details on this. I've kind of run on here. Alicia.