Use Young's Rule to Determine the Appropriate dosage for a 7-year old child who needs propylthiouracil. The normal adult daily dose is 150mg.

by Maria
(United States)

Please round to the nearest tenths position. The normal adult daily dose is 150mg. A 7-year old child is prescribed Propylthiouracil. Find the appropriate dosage for the child by using Young's Rule.

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by: Anonymous

If the adult dose is 150 mg, the child dose cannot be higher than 150 mg.

The formula should be the opposite: 7 / 19 = 0.3684.
Then, 150 mg * 0.3684 = 55.26 mg or, when rounded to the tenth, it is equal to 55.3 mg. That makes sense, a 7-year old kid should only get 55.3 mg (when an adult is getting the entire 150 mg).
It is not about the math, it is about a kid's life (sometimes, depending on the medication).

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