In clinical pharmacology trial WP18551, after a single dose intravenous administration of 6 mg (15 minutes infusion), mean AUC0-24 increased by 14% and 86%, respectively, in subjects with mild (mean estimated CLcr=68.1 mL/ min) and moderate (mean estimated CLcr=41.2 mL/ min) renal impairment compared to healthy volunteers (mean estimated CLcr=120 mL/ min).