Pediatric dosage is often calculated using weight-based formulas. One common method is to use milligrams per kilogram (mg/kg) of body weight. For example, if a medication is prescribed at 5 mg/kg and the child weighs 20 kg, the dosage would be 100 mg. In some cases, particularly for infants and younger children, body surface area (BSA) may be used, calculated through formulas like the Mosteller formula.
