Cefapirin sodium is primarily used as a broad-spectrum antibiotic in veterinary medicine. It is effective against a range of bacterial infections, particularly those caused by Gram-positive and some Gram-negative bacteria.

In dairy cattle, it is commonly administered to treat mastitis, an inflammation of the udder tissue often caused by bacterial infection. The antibiotic is typically delivered via intramammary infusion, directly targeting the infected area to reduce bacterial load and alleviate symptoms.

Its application helps in maintaining animal health, ensuring milk quality, and preventing the spread of infections within herds. Proper usage and adherence to withdrawal periods are essential to avoid antibiotic residues in milk, ensuring food safety for consumers.