7 DRUG INTERACTIONS Vancomycin, amsacrine, aminoglycosides, and fluconazole are physically incompatible. ( 7.2 ) 7.1 Vancomycin, Amsacrine, Aminoglycosides, and Fluconazole Vancomycin, amsacrine, aminoglycosides, and fluconazole are physically incompatible with ceftriaxone in admixtures [see Dosage and Administration (2.3) ].
Source: FDA drug label - ceftriaxone