Anaphylaxis, angioedema, pruritus, serum sickness-like reaction, urticaria; pseudomembranous colitis; hemolytic anemia, leukopenia, pancytopenia, thrombocytopenia & increased prothrombin time. Hepatic impairment including hepatitis & cholestatic jaundice. Seizure. Erythema multiforme, SJS & TEN. Renal dysfunction. Toxic nephropathy, hepatic cholestasis, aplastic anemia, hemolytic anemia, hemorrhage, increased BUN, increased CrCl, false +ve test for urinary glucose, increased alkaline phosphatase, neutropenia, elevated bilirubin & agranulocytosis.