Adult & childn IV/IM 2.5-5 mg/kg daily in 2-4 divided doses, depending on the severity of the infection. Max: 5 mg/kg.
Oral inhalation 33.33-66.66 mg (1-2 million IU) bid-tid.
Renal impairment serum creatinine 2.6-4 mg/100 mL 1.5 mg/kg daily every 36 hr,
1.6-2.5 mg/100 mL 2.5 mg/kg daily in a single dose or in 2 divided doses,
1.3-1.5 mg/100 mL 2.5-3.8 mg/kg daily in 2 divided doses.