IV/IM Adult 500 mg-1 g every 8-12 hr.
Childn & infant (>1 mth) 25-50 mg/kg every 24 hr.
Severe infection Renal impairment: CrCl 20-50 mL/min Starting dose: 500 mg. Maintenance dose: 250 mg daily every 6 hr or 500 mg daily every 12 hr,
10-20 mL/min Starting dose: 500 mg. Maintenance dose: 250 mg daily every 12 hr or 500 mg daily every 24 hr,
5-10 mL/min Starting dose: 500 mg. Maintenance dose: 250 mg daily every 24-36 hr or 500 mg daily every 48-72 hr,
<5 mL/min in patient on haemodialysis Starting dose: 500 mg IV. Maintenance dose: 500 mg daily every 72 hr.
Mild infection Renal impairment: CrCl 20-50 mL/min Starting dose: 500 mg. Maintenance dose: 125-250 mg daily every 12 hr,
10-20 mL/min Starting dose: 500 mg. Maintenance dose: 125-250 mg daily every 24 hr,
5-10 mL/min Starting dose: 500 mg. Maintenance dose: 75-125 mg daily every 24 hr,
<5 mL/min in patient on haemodialysis Starting dose: 500 mg IV. Maintenance dose: 50-75 mg daily every 72 hr.
IV Prophylaxis of post-op infection 1 g during anaesth induction followed by 0.5-1 g every 6-8 hr for 24 hr post-op.
Operative procedure lasting >2 hr 0.5-1 g during surgery.