Respiratory Tract Infections: Adult: 250-500 mg twice daily.
Child: >3 months: 125 mg twice daily or 10mg/kg twice daily. Max dose: 250 mg daily.
Uncomplicated Gonorrhoea: Adult: 1 g as a single dose. 1 g oral probenecid may be given concurrently.
Otitis Media: Child: >2 yr: 250 mg twice daily or 15 mg/kg twice daily up to 500 mg daily.
Meningitis: Adult: 3 g every 8 hrs.
Child: 200-240 mg/kg/day in 3-4 divided doses, decreased to 100 mg/kg/day after 3 days or once symptoms have improved.
Neonate: 100 mg/kg/day, decreased to 50 mg/kg/day when control has been achieved.
Renal Impairment: Patients undergoing haemodialysis should receive an additional 750-mg dose after each dialysis; those undergoing continuous peritoneal dialysis may be given 750 mg twice daily. (See table.)

Oral suspension: Uncomplicated Urinary Tract Infection: Child: 10 mg/kg 2x a day.
Respiratory Tract Infections: Child >3 months: 125 mg 2x a day or 10 mg/kg 2x a day. Max dose: 250 mg daily.
Otitis Media: Child: >2 yrs: 250 mg 2x a day or 15 mg/kg 2x a day up to 500 mg daily.
Meningitis: Child: 200-240 mg/kg/day in 3-4 divided doses, decreased to 100 mg/kg/day after 3 days or once symptoms have improved.
Neonate: 100 mg/kg/day, decreased to 50 mg/kg/day when control has been achieved.