vancomycin

1. (pharmacology) A glycopeptide antibiotic C₆₆H₇₅Cl₂N₉O₂₄ produced by the actinomycete Amycolaptosis orientalis, used in the form of its hydrochloride C₆₆H₇₅Cl₂N₉O₂₄·HCl against Gram-positive bacteria, especially staphylococci resistant to meticillin and enterococci.Examples: "Vancomycin was given intravenously in doses of 0.5 gm. at 6-hour intervals for periods of up to 4 weeks to 9 patients, all of whom had staphylococcal infections."uncountable