IM/IV/IV infusion IV administration should be given over 2-4 min. IV infusion should be given over at least 30 min.
Adult & childn >12 yr 1-2 g once daily (every 24 hr).
Severe cases or infections caused by moderately sensitive organisms 4 g once daily.
Childn weighing ≥50 kg Give adult dose.
Childn up to 12 yr & infant ≥50 mg/kg by infusion over at least 30 min or 60 min (in neonates).
Childn, infant & neonate (15 days to 12 yr) 20-80 mg/kg once daily.
Neonate up to 14 days 20-50 mg/kg once daily. Max: 50 mg/kg daily.
Meningitis Childn & infant Initially 100 mg/kg (up to max 4 g) once daily. Duration of therapy:
Neisseria meningitidis: 4 days,
H. influenzae: 6 days,
Strep pneumoniae: 7 days.
Lyme borreliosis Adult & childn 50 mg/kg to max 2 g once daily for 14 days.
Gonorrhoea (penicillinase-producing & nonpenicillinase-producing strains) 250 mg IM as single dose.
Perioperative prophylaxis 1-2 g single dose 30-90 min prior to surgery.
Preterminal renal failure (CrCl <10 mL/min) Max: 2 g daily.