oxacillin Oxacilline Oxazocillin ChEBI:7809 Prostaphlyn Oxacillin is a penicillinase-resistant beta-lactam. It is similar to methicillin, and has replaced methicillin in clinical use. Oxacillin, especially in combination with other antibiotics, is effective against many penicillinase-producing strains of Staphylococcus aureus and Staphylococcus epidermidis. MPI-penicillin CAS:66-79-5 Ossacillina ChEMBL:CHEMBL819 ARO:0000056 Oxazocilline antibiotic_resistance Oxacillinum Oxacilina Prostaphlin PubChem:6196 beta-lactamase resistant penicillin