Nafcillin, a beta-lactam antibiotic, stands as a potent weapon against resistant staphylococcal infections. This agent targets penicillinase-producing staphylococci, crucial in tackling resistant strains. In a landscape where resistant pathogens challenge therapeutic efforts, nafcillin injection holds a pivotal role. Understanding its efficacy requires delving into its mechanisms, applications, and limitations. Nafcillin Injection and Resistant Staphylococci The