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Susceptible infections
Adult: 4-6 mg/kg once daily or in equally divided doses given every 8 or 12 hr. Life-threatening infections: Increase to up to 7.5 mg/kg daily every 8 hr. All doses may be given as IM, slow IV (over 3-5 min) or as 50-200 ml infusion over 0.5-2 hr. Treatment is usually given for 7-14 days.
Child: Premature infants and neonates <1 wk: 6 mg/kg daily in divided doses every 12 hr. Infants and neonates >1 wk: 7.5-9 mg/kg daily in divided doses every 8 hr. Older children: 6-7.5 mg/kg daily in divided doses every 8 hr. Alternative regimen: Neonates <6 wk: 4-6.5 mg/kg daily in divided doses every 12 hr. Older infants and children: 5.5-8 mg/kg daily in divided doses every 8 or 12 hr.
Child: Premature infants and neonates <1 wk: 6 mg/kg daily in divided doses every 12 hr. Infants and neonates >1 wk: 7.5-9 mg/kg daily in divided doses every 8 hr. Older children: 6-7.5 mg/kg daily in divided doses every 8 hr. Alternative regimen: Neonates <6 wk: 4-6.5 mg/kg daily in divided doses every 12 hr. Older infants and children: 5.5-8 mg/kg daily in divided doses every 8 or 12 hr.
Parenteral
Urinary tract infections
Adult: 150 mg as a single daily dose for 5 days. Complicated UTI: 3-4 mg/kg daily in divided doses every 12 hr. All doses may be given as IM, slow IV (over 3-5 min) or as a 50-200 ml infusion over 0.5-2 hr. Treatment is usually given for 7-14 days.
