Antibiotics may do more than fight infection – new study reveals hidden effects

NCT ID NCT02707042

First seen Nov 01, 2025 · Last updated May 05, 2026 · Updated 30 times

Summary

This study looked at how two common antibiotics (amoxicillin and azithromycin) change the community of microbes living in healthy people, and whether those changes affect metabolism and the immune system. Over 100 healthy adults took antibiotics for a week or less, and researchers tracked their microbes, energy use, and immune markers. The goal was to understand the hidden effects of antibiotics beyond killing bacteria.

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Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892, United States

Conditions

Explore the condition pages connected to this study.