Used primarily as an injectable antibiotic to treat infections caused by gram-positive bacteria, especially penicillinase-producing staphylococci. Commonly prescribed in hospital settings for skin and soft tissue infections, bone infections, and endocarditis when methicillin-sensitive strains are suspected. Often chosen when patients require a penicillinase-resistant penicillin due to its stability against certain bacterial enzymes that inactivate standard penicillins. Administered intravenously or intramuscularly, it achieves good tissue penetration and is frequently used in surgical prophylaxis where resistant staphylococcal infections are a concern.