ANTIBIOTICS LEAD TO ULCERS?? This is not a normal association in allopathic medicine, but if you follow the physiology it makes tremendous sense. The bottom line is that antibiotics decimate our normal, protective flora whether it is in the back of the throat, small intestine, vaginal vault, large intestine or even in the stomach. We have seen studies where lower levels of lactobacillus lead to higher levels of H. pylori. This is another study (albeit an animal study) that demonstrates the link between low levels of protective flora and higher levels of H. pylori. The ironic thing is that H. pylori is treated with a triple course of antibiotics, which is likely how it got there in the first place!!