IV/IM Adult 1-6 g daily in 2 or 3 divided doses.
UTI & less severe infection 500 mg to 1 g every 12 hr.
Most infections 1 g every 8 hr or 2 g every 12 hr.
Immunocompromised patient including those w/ neutropenia Very severe infection 2 g every 8 or 12 hr.
Fibrocystic adult w/ pseudomonal lung infection 100-150 mg/kg daily in 3 divided doses.
Prostatic surgery prophylaxis 1 g at induction of anaesth. Consider 2nd dose at the time of catheter removal.
Infant & childn >2 mth 30-100 mg/kg daily in 2 or 3 divided doses.
Immunocompromised/fibrocystic childn or those w/ meningitis May give up to 150 mg/kg daily. Max: 6 g daily.
Neonate 0-2 mth 25-60 mg/kg daily in 2 divided doses.
Elderly >80 yr Max daily dose: 3 g.
Renal impairment: CrCl 31-50 mL/min 1 g every 12 hr,
16-30 mL/min 1 g every 24 hr,
6-15 mL/min 0.5 g every 24 hr,
<5 mL/min 0.5 g every 48 hr.
Patient in renal failure on continuous arteriovenous haemodialysis or high-flux haemofiltration in intensive therapy units 1 g daily either as single dose or in divided doses.