Tylosin (brand name: Tylan®) is an antibiotic in the same family as erythromycin. It is primarily used in cats, dogs, and small mammals to treat diarrhea and inflammation of the gastrointestinal tract.

Its use in dogs to treat inflammatory bowel disease, and its use in dogs, cats, and ferrets to treat certain intestinal infections causing diarrhea is 'off label' or 'extra label'.