Adults and children over 10 years: 200-400 mg daily, either in one dose or two divided doses, depending on the infection’s severity.

Elderly: The same dosage as adults is recommended. However, kidney function should be checked, and the dose may be adjusted for severe kidney issues.

Children: The usual dose is 8 mg per kg of body weight per day, either in one dose or two divided doses. The following doses are given as guidelines:

• 6 months to 1 year: 3.75 ml daily
• 1-4 years: 5 ml daily
• 5-10 years: 10 ml daily
• In typhoid: 5 mg/kg body weight twice daily for 10-14 days.

For children over 10 years or weighing more than 50 kg, the adult dosage of 200-400 mg daily is recommended.

Renal Impairment: In patients with severe kidney problems, the dose should be reduced, especially if their creatinine clearance is less than 20 ml/min.