IVAdult & childn including elderly up to 60 kg 50,000-75,000 u/kg daily divided into 3 doses at approx 8-hr intervals, >60 kg 1-2 MIU tds. Max: 6 MIU in 24 hr. Min duration: 5 days. Patient ≥60 kg Renal impairment CrCl 20-50 mL/min 1-2 MIU every 8 hr, CrCl 10-20 mL/min 1 MIU every 12-18 hr, CrCl <10 mL/min 1 MIU every 18-24 hr. InhalationPatient w/ CF 500,000 u bd to 2 MIU tds. Childn <2 yr 500,000 u to 1 MIU bd, >2 yr & adult 1-2 MIU bd. Duration: Up to 12 days.