Vancomycin is an antibiotic used to treat serious bacterial infections, particularly those caused by Gram-positive bacteria such as Staphylococcus aureus and Streptococcus species. It is often reserved for cases where other antibiotics are ineffective, especially in patients with penicillin Allergies or resistant infections. Vancomycin can be administered intravenously or orally, depending on the type of infection being treated. Common uses include treating conditions like septicemia, endocarditis, and severe skin infections.