Rash (maculopapular or erythematous), pruritus, fever, eosinophilia; inflammation, phlebitis, thrombophlebitis (IV); pain, induration, tenderness at inj site (IM); anorexia, diarrhoea, nausea, vomiting, abdominal pain; transient neutropenia, granulocytopenia, leucopenia, eosinophilia or thrombocytopenia; transient increases in BUN and/or serum creatinine concentrations and interstitial nephritis; hepatitis, jaundice, cholestasis; transient increases in serum AST, ALT, LDH, γ-GT, bilirubin, and alkaline phosphatase concentrations; headache, agitation, confusion, fatigue, nocturnal perspiration. Stevens-Johnson syndrome, toxic epidermal necrolysis, erythema multiforme.
Potentially Fatal: Clostridium difficile-associated diarrhoea and colitis, arrhythmias, anaphylaxis.