Overview
This lecture reviews how to use Fried's Rule, Young's Rule, and Clark's Rule to calculate pediatric medication dosages, using a sample problem.
Fried's Rule
- Formula: Pediatric dose = (Age in months / 150) × Adult dose.
- Given: Age = 24 months, Adult dose = 500 mg.
- Calculation: (24 / 150) × 500 mg = 80 mg.
Young's Rule
- Formula: Pediatric dose = [Age in years / (Age in years + 12)] × Adult dose.
- Convert 24 months to 2 years.
- Calculation: [2 / (2 + 12)] × 500 mg = 71 mg.
Clark's Rule
- Formula: Pediatric dose = (Weight in pounds / 150) × Adult dose.
- Convert 13 kg to pounds: 13 × 2.2 = 28.6 lb.
- Calculation: (28.6 / 150) × 500 mg = 95 mg.
Comparing the Results
- Fried's Rule result: 80 mg.
- Young's Rule result: 71 mg.
- Clark's Rule result: 95 mg.
- Each rule uses different child specifics (age in months, age in years, weight in pounds) for dosage calculation.
Key Terms & Definitions
- Fried's Rule — pediatric dose calculation for infants using age in months.
- Young's Rule — pediatric dose calculation for children using age in years.
- Clark's Rule — pediatric dose calculation based on child's weight in pounds.
- Adult Dose — standard dosage prescribed for adults.
Action Items / Next Steps
- Practice more pediatric dosage calculations using all three rules for different scenarios to build confidence.