Adults: Bronchitis, pneumonia: 500 mg twice daily.
For most infections: 250 mg twice daily.
For urinary tract infections: 125 mg twice daily.
For the treatment of uncomplicated gonorrhoea: a single dose of 1 g.
Children: The usual recommended dosage: 125 mg twice daily; or 10 mg/kg twice daily, a maximum dosage of 250 mg/day.
In children 2 years or older with otitis media: 250 mg twice daily; or 15 mg/kg twice daily, a maximum dosage of 500 mg/day.