Mainly used for the prevention and treatment of bovine pneumonia and mastitis caused by sensitive bacteria, and also used for mycoplasma disease in pigs and chickens. Pharmacodynamic antibacterial effect is similar to tylosin, mainly against gram-positive bacteria, but also effective against a few gram-negative bacteria and mycoplasma. Its activity against Actinobacillus pleuropneumoniae, Pasteurella and Mycoplasma of livestock and poultry is stronger than tylosin. It has been reported that 95% of Pasteurella hemolytica strains are sensitive to this product. Pharmacokinetics After oral administration or subcutaneous injection, this product is rapidly absorbed, has strong tissue penetration, and has a large volume of distribution.