Adult & childn >12 yr
1-2 g once daily. May be increased to 4 g daily in severe infections. Infant & childn <12 yr
50-70 mg/kg/day. Max: 2 g daily in divided doses 12 hrly. Peri-op prophylaxis
1-2 g as a single dose 30-90 min pre-op. Gonorrhoeae
250 mg IM as a single dose. Meningitis Infant & childn
Initially 100 mg/kg/day (max: 4 g daily) in divided doses 12 hrly.