CLARK’S RULE
#03
Use Clark’s Rule to find the child's dosage of
an obsolete rule for an approximate child’s amoxicillin. Round answer to the nearest whole
dose mg. The child's dosage is based on the normal
not used clinically adult dosage.
it determines the approximate dosage of Adult dosage: amoxicillin 250 mg
drug appropriate for a child 2-7 yo by Child's weight: 18 kg
dividing the child’s weight in pounds by 150 Child's height: 94 cm
and multiplying the result by the adult
dosage
named after Dr. Cecil Belfield Clark (1894–
1970), a Barbadian physician who served in
London Boroughs for 50 years and was an
early advocate for homosexuality rights
#01
Use the Clark’s Rule to find the child's dosage of
amoxicillin. Round answer to the nearest whole
mg. The child is of normal height for her weight.
#04
The child's dosage is based on the normal adult Use Clark’s Rule to find the child's dosage of
dosage. meperidine. Round answer to the nearest
Adult dosage: amoxicillin 250 mg whole mg. The child is of normal height for her
Child's weight: 9 1/2 lbs weight.
The child's dosage is based on the normal adult
dosage.
Normal child's dosage: meperidine 50 mg
Child's weight: 34 lbs
#02
Use the Clark’s rule to find the child's dosage of
garamycin. Round answer to the nearest whole
mg. The child is of normal height for her weight.
The child's dosage is based on the normal adult FRIED’S RULE
dosage.
Adult dosage: garamycin 40 mg
Child's weight: 41 lbs
-a method of estimating the dosage of drug for
a child by multiplying the adult dosage by the
child’s age in months and dividing the result by
150
-generally reserved for use in children <2 yrs of
age
-named after Dr. Kalman Fried (1914–1999), an Normal child's dosage: meperidine 50 mg
Israeli geneticist and pediatrician who Child's weight: 34 lbs
developed his own formula while treating and
observing children at the University of
Jerusalem affiliated Hospital – Hadassah
Medical Center in the 1960s; Dr. Fried though
was more renowned as a geneticist rather than
a pediatrician
#05
Use the Fried’s Rule to find the 3-month infant's
dosage of amoxicillin. YOUNG’S
Round answer to the nearest whole mg. The
child is of normal height for her weight. The RULE
child's dosage is based on the normal adult
dosage
Adult dosage: amoxicillin 250 mg
Child's weight: 9 1/2 lbs
-a rule for calculating the dosage of drug correct
for a child by adding 12 to the child’s age,
dividing the sum by the child’s age, then
dividing the adult dosage by the figure obtained
-named after Dr. Thomas Young (1773–1829),
an English polymath, physician and physicist
#06
Use the Fried’s rule to find the 1.5 year old
#08 The doctor orders tylenol (Acetaminophen)
child's dosage of garamycin.
500 mg PO PRN for pain. Calculate the dosage
Round answer to the nearest whole mg. The
for a 10 year-old child using
child is of normal height for her weight. The
Young’s Rule.
child's dosage is based on the normal adult
dosage
Adult dose: garamycin 40 mg 227 mg
Child's weight: 41 lbs
PRACTICE PROBLEM #9
The doctor orders Benadryl (Diphenhydramine)
50 mg PO every 6 hours PRN. Calculate the
dosage for a 4 year-old child using Fried’s Rule.
Young’s Rule
12-13 mg
#07
Use the Fried’s Rule to find the 20 -month old PRACTICE PROBLEM #11
child's dosage of meperidine. Round answer to The doctor orders tylenol (Acetaminophen) 500
the nearest whole mg. The child is of normal mg PO PRN for pain. Calculate the dosage for a
height for her weight. The child's dosage is 7 year-old child using
based on the normal adult dosage. Young’s Rule.
184 mg Physician orders amoxicillin for a 5
year-old child.
Usual adult dosage is 500 mg.
Young’s Rule
PRACTICE PROBLEM #12 147 mg
The doctor orders an adult dosage of 2
million units of Penicillin G potassium per day
divided into 4 doses. Calculate the dosage per
day for a 10 year-old child using Young’s Rule.
909, 091 units
PRACTICE PROBLEM #13
The doctor orders an adult dosage of Dilantin
(Phenytoin) 100 mg tid. Calculate the dosage for
a child weighing 25 lbs using Clark’s Rule.
17 mg
PRACTICE PROBLEM #14
The doctor orders an adult dosage of
Amoxicillin 500 mg IV q 8 hours. Calculate the
dosage for a child weighing 18 lbs using Clark’s
Rule.
60 mg
PRACTICE PROBLEM #15
A 10 year-old, 68 lbs child is to receive
Carbamazepine for seizure disorder.
The usual adult dosage is 300 mg.
Young’s Rule
136 mg
PRACTICE PROBLEM #16
Physician orders amoxicillin for a
6 month-old infant.
Usual adult dosage is 500 mg.
Fried’s Rule
20 mg
PRACTICE PROBLEM #17
