- Creatinine ≤ 1.5 x IULN OR creatinine clearance ≥ 40 mL/min/1.73 m2 for patients with creatinine levels > 1.5 x IULN (that is, if serum creatinine is > 1.5 x IULN, a 24-hour urine collection to calculate creatinine clearance must be performed)