Otilonium bromide is a poorly absorbed oral medication used to control irritable bowel syndrome. It is thought to act as a muscle relaxant in the intestine. Here, we show that otilonium bromide has broad-spectrum antibacterial and antifungal activity, including against multidrug-resistant strains. Our results suggest otilonium bromide acts on enteric pathogens and may offer a new scaffold for poorly absorbed intestinal antimicrobial therapy.
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