Could the Antibiotic Be the Real Culprit?
For years, the standard explanation has been that food poisoning is one of the most common triggers for small intestinal bacterial overgrowth, or SIBO. The infection damages the gut, disrupts motility, and sets the stage for bacterial overgrowth.
But here is a question worth sitting with. What if it is not the food poisoning that causes SIBO? What if it is the treatment?
When someone shows up with food poisoning, a powerful class of antibiotics is frequently prescribed. These same antibiotics carry an FDA black box warning for causing permanent nerve damage. And the nervous system that controls gut motility may be just as vulnerable as the peripheral nerves the FDA warned about.
The chain of reasoning leads to an uncomfortable possibility: the antibiotic prescribed to treat the infection may be the actual cause of the condition that follows.
The research that established post-infectious SIBO largely focused on the pathogen. But how many of those patients were also treated with this same class of antibiotics? That confounding variable has gone largely unexamined.
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Authored by Gerard Guillory, MD
Gerard Guillory, MD, is a board-certified internist who practiced for nearly four decades with a focus on functional, root-cause medicine. He is the author of three books on irritable bowel syndrome and the founder of It’s My Health, where he and his team put current health news in context and help members understand the underlying causes of chronic symptoms.
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