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Pediatric Drug Dose Calculation
Pediatric medication dosing is predominantly weight-based, typically expressed in milligrams per kilogram (mg/kg). Accurate calculation is critical to ensure efficacy and avoid toxicity, as pediatric patients process drugs differently than adults.
Formulas Used
- Total Dose (mg) = Weight (kg) × Dose (mg/kg)
- Liquid Volume (mL) = Total Dose (mg) / Concentration (mg/mL)
- Weight Conversion: 1 kg = 2.20462 lbs
How to Use
Enter the child's weight and the prescribed medication dose per kg (e.g., mg/kg). If you are administering a liquid, provide the concentration (e.g., mg/mL) to calculate the volume to administer.
Case Example
Patient: 15 kg child needing acetaminophen. Dose is 15 mg/kg. Suspension is 160 mg / 5 mL.
Calculation: Dose = 15 * 15 = 225 mg. Volume = 225 / (160/5) = 7.03 mL.
Interpretation: Administer 7 mL of the suspension.
Frequently Asked Questions
Yes, pediatric doses should never exceed the maximum adult dose. Always cross-check the calculated dose with maximum daily limits.