Adult 1-2 g every 6-8 hr.
Uncomplicated infection (eg, pneumonia, UTI, cutaneous infection) 1 g IV every 6-8 hr. Daily dosage: 3-4 g.
Moderately severe or severe infection 1 g IV every 4 hr or 2 g IV every 6-8 hr. Daily dosage: 6-8 g.
Infections commonly needing antibiotics in higher dosage (eg, gas gangrene) 2 g IV every 4 hr or 3 g IV every 6 hr. Daily dosage: 12 g.
Renal insufficiency Initial loading dose: 1-2 g.
Patient undergoing hemodialysis 1-2 g after each hemodialysis.
Mild impairment (CrCl 50-30 mL/min) 1-2 g every 8-12 hr,
moderate impairment (CrCl 29-10 mL/min) 1-2 g every 12-24 hr;
severe impairment (CrCl 9-5 mL/min) 0.5-1 g every 12-24 hr;
essentially no function (CrCl <5 mL/min) 0.5-1 g every 24-48 hr.
Childn ≥3 mth 80-160 mg/kg/day divided into 4-6 equal doses. Max: 12 g/day.
Post-op prophylaxis Administer ½-1 hr prior to surgery.
Prophylaxis in uncontaminated GI surgery, vag hysterectomy, abdominal hysterectomy Adult 2 g every 6 hr for not >24 hr.
Cesarean section 2 g IV as soon as the umbilical cord is clamped or 3-dose regimen consisting of 2 g IV as soon as the umbilical cord is clamped followed by 2 g 4 & 8 hr after the initial dose.
Childn ≥3 mth 30-40 mg/kg may be given at the same time intervals as adult.