Used primarily as an intestinal antiseptic, it treats acute diarrhea caused by susceptible bacteria in the gastrointestinal tract. It works by inhibiting bacterial DNA replication and disrupting cell metabolism, effectively reducing pathogenic load without being significantly absorbed into the bloodstream. This localized action makes it suitable for managing infectious diarrhea in adults and children, especially in cases linked to enteropathogenic strains of E. coli. It is commonly formulated in oral tablets or suspension for symptomatic relief during acute episodes.