Which of the following is the correct dosage for a 30 lb child, if the adult dose is 100 mg?

12 mg
20 mg
55 mg
76 mg


20 mg

Rationale: Using Clark's rule (weight in pounds divided by 150, multiplied by the adult dose), we find that: 30 ----- 150 x 100 = 20 mg.

Health Professions

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