Childrens Dosages

by Paul Tsurui

How much medication should a 70lb child receive if the adult dose is 250mg?

Reply: (by Keith)

It depends: what you need to know is either 1)which method the prescriber prefers, or 2) Which method the pharmacist wants to use, or 3) the guidelines set by the institution. Since this website is primarily a study guide to prepare for the PTCB or ExCPT, this question would normally be followed by "using Clarks rule" or "using Youngs rule". Those formulas can be found on this page. Let's say that within the question it asked for Clarks' rule. Calculate that and leave your answer in a comment box below this.

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Childrens Dosages

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Jun 16, 2011
Clarks Rule
by: Anonymous

(Child weight / 150) X adult dose
( 7 0 / 1 5 0 )x 250mg = 116.6 (rounded 117 mg)

Jun 15, 2011
i think
by: tanesha

I got 116.6 using clark's rule

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