Chemistry K levels Normal limits Mg levels Normal limits Renal Serum creatinine or calculated creatinine clearance ≤2.0mg/dL OR ≥40 mL/min for patients with creatinine levels > 2.0mg/dL Hepatic Serum total bilirubin Normal limits AST (SGOT) and ALT (SGPT) ≤ 3 X ULN Alkaline Phosphatase (liver fraction) ≤ 3 X ULN a Creatinine clearance should be calculated per institutional standard.