Question:
Which of the following formula for calculating child dose is based on body weight:
Which of the following formula for calculating child dose is based on body weight:
Updated On: Jul 14, 2026
- Clark’s formula
- Fried’s formula
- Young’s formula
- Dilling's formula
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The Correct Option is A
Approach Solution - 1
The correct option is (A): Clark’s formula
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The question asks which pediatric dosing formula bases the child's dose on body weight rather than age. Let's check each formula.
- Clark's formula: This formula calculates the child's dose as the child's weight in pounds divided by 150, multiplied by the adult dose. Since the calculation is driven entirely by the child's weight, this is a weight-based formula.
- Fried's formula: This formula is used for infants and calculates the dose as age in months divided by 150, multiplied by the adult dose. It is based on the infant's age in months, not weight.
- Young's formula: This formula calculates the dose as age in years divided by age plus 12, multiplied by the adult dose. It is based purely on the child's age in years.
- Dilling's formula: This formula calculates the dose as age in years divided by 20, multiplied by the adult dose. Like Young's and Fried's formulas, it depends on age, not weight.
Among these four, only Clark's formula uses the child's body weight as the variable that determines the dose.
Therefore, the correct answer is Clark's formula.
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