To treat existing mastitis infections and to provide protections against further infections during the dry period.
Orbenin is active against Gram positive organisms associated with mastitis. It is effective against Streptococcus agalactiae and other streptococcal species, penicillin-resistant and sensitive staphylococci and Actinomyces pyogenes. Orbenin is not destroyed by staphylococcal penicillinase. It is therefore active against penicillin resistant staphylococci which are an important cause of mastitis.