Used primarily in veterinary medicine, especially in the treatment of bacterial infections in livestock such as cattle. It is commonly administered for mastitis in dairy cows due to its long-acting properties. The benzathine salt allows for slow release of cephapirin, providing sustained antibiotic activity over an extended period. This makes it effective for infections requiring prolonged therapy with fewer repeated doses. It targets gram-positive bacteria and some gram-negative organisms, offering broad coverage in field conditions. Its use is limited in humans due to formulation and pharmacokinetic factors.