Adult 3-4 mg/kg daily in divided doses. Typical doses:
≥60 kg 80 mg 8 hrly,
<60 kg 60 mg 8 hrly.
Renal impairment CrCl >70 mL/min 80 mg 8 hrly,
30-70 mL/min 80 mg 12 hrly,
10-30 mL/min 80 mg daily,
5-10 mL/min 80 mg every 48 hr,
<5 mL/min 80 mg after dialysis.
UTI 160 mg once daily. Increase dose to 6 hrly or for a total dose of 5 mg/kg in 24 hr in cases of life-threatening infections.
Childn up to 12 yr 2 mg 8 hrly.
Infant up to 2 wk 3 mg 12 hrly.