Dosing for Children

 Clark’s Rule 

To determine the appropriate dosage for a child, use this formula: 

child’s weight/150 

Convert this to the lowest fraction.

Then multiply the dose (number of drops) times the fraction: Number of drops x child’s weight/150 

This is the adjusted children’s dose. 

Note: Clark’s Rule applies to dose, not frequency; frequency stays the same. 

Example 

Child’s weight is 100 lbs.

Clark’s Rule: 100/150 = 2/3 

If the adult dose is 12 drops, a 100lb child would take two thirds of that, which is 8 drops.