Used primarily to treat bacterial infections caused by gram-positive organisms, especially penicillinase-producing staphylococci. Commonly prescribed for skin and soft tissue infections, respiratory tract infections, and bone and joint infections when susceptibility is confirmed. Often utilized in hospital settings for patients with confirmed or suspected penicillin-resistant staphylococcal infections. Not effective against methicillin-resistant Staphylococcus aureus (MRSA). Administered intravenously or intramuscularly in clinical environments.