Hypersensitivity reactions: Anaphylaxis, angioedema, pruritus, rash, serum sickness-like reaction, urticaria, pseudomembranous colitis, hemolytic anemia, leukopenia, pancytopenia, thrombocytopenia, increased prothrombin time, hepatic impairment including hepatitis & cholestasis, jaundice, seizure, erythema multiforme, Stevens-Johnson syndrome, toxic epidermal necrolysis, renal dysfunction.