Used primarily in swine production as a feed additive to control bacterial swine dysentery and to promote growth. It helps reduce the incidence of infections caused by susceptible strains of bacteria in the gastrointestinal tract. Due to concerns over potential carcinogenic residues and antimicrobial resistance, its use is restricted or banned in several countries, including the European Union and Canada. Approved use, where permitted, is strictly regulated with defined withdrawal periods before slaughter.