Renal Insufficiency Following a single 500 mg dose of Doribax, doripenem AUC increased 1.6-fold, 2.8-fold, and 5.1-fold in subjects with mild (CrCl 51-79 ml/min), moderate (CrCl 31-50 ml/min), and severe renal impairment (CrCl ≤ 30 ml/min), respectively, compared to age-matched healthy subjects with normal renal function (CrCl > 80 ml/min).