Final answer:
The Young's Rule is used to calculate the child's dose based on age and weight. For a 2-year old child weighing 26 lbs and an adult dose of 500mg, the child's dose is approximately 83.33mg.
Step-by-step explanation:
The Young's Rule is used to calculate the dosage for children based on their age and weight. According to the Young's Rule, the child's dose is calculated by multiplying the adult dose by the child's age in years and dividing it by the sum of 12 and the child's age in years.
In this case, the child is 2 years old and weighs 26 lbs. Let's assume that the adult dose is 500mg. The child's dose can be calculated as:
- Child's dose = (Adult dose × Child's age in years) ÷ (12 + Child's age in years)
- Child's dose = (500mg × 2) ÷ (12 + 2)
- Child's dose ≈ 83.33mg
Therefore, the 2-year old child's dose is approximately 83.33mg.