c.
Young's Rule:
(1)
Child's dose = Child's age in years
X Adult dose
Child's age in years + 12 years
(2) Example problem: The adult maintenance dose of a drug is 325 mg.
Calculate the dosage for a 3-year-old child.
(3)
Solution:
3
X 325 mg = Child's dose
3 + 12
3
X 325 mg = 65 mg
15
d.
Clark's Rule:
(1)
Child's dose = Child's weight in lbs. X Adult dose
150 lbs.
(2) Example problem: The adult dose of Doxycycline is 100 mg. Calculate
the dosage for a child weighing 50 pounds.
(3)
Solution:
50 lbs. X 100 mg = Child's dose
150 lbs.
1 X 100 mg = 33.3 mg
3
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MD0802
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