Deck 8: Dosage Problems for Infants and Children

Question 1

An infant weighs 12 lb 6 oz. How many pounds does this infant weigh?

A) 12
B) 12.375
C) 12.475
D) 13

Answer 1

12.375

Question 2

An infant weighs 98 ounces. How many pounds does the infant weigh?

A) 6.125
B) 6.225
C) 6.335
D) 6.456

Answer 2

6.125

Question 3

A child weighs 30 lb. How many kilograms does this child weigh? Round to the nearest hundredth.

A) 13.64
B) 13.73
C) 13.84
D) 13.93

Answer 3

13.64

Question 4

A child weighs 14 lb 8 oz. How many kilograms does this child weigh?

A) 6.48
B) 6.59
C) 14.4
D) 14.5

Question 5

A child weighs 35 lb and has an order for Keflex (cephalexin) 150 mg po every 6 hours. The literature states the usual children's dose is 25 to 50 mg/kg a day in four divided doses. The drug label reads 125 mg/5 mL. What is the safe dosage range per day for this medication?

A) 197.75 to 695.75
B) 297.75 to 725.5
C) 397.75 to 795.5
D) 400.25 to 810.75

Question 6

A child weighs 3 kg and has an order for phenobarbital sodium 10 mg po per day. The literature states that the usual children's dose is 3 to 5 mg/kg/day. The drug label reads phenobarbital elixir 20 mg/5 mL. How many milliliters should the nurse administer? Use the formula method to calculate the amount to give.

A) 1.5
B) 2
C) 2.5
D) 3

Question 7

An infant who weighs 9 pounds has an order for Kantrex (kanamycin sulfate) 30 mg IV every 12 hours. The literature states that the recommended dosage is 15/kg/day in two divided doses. The vial is labeled 75 mg/2 mL. How many milliliters should the nurse administer per dose? Use the proportion (fractions) method to calculate the amount to give.

A) 0.8
B) 0.9
C) 1
D) 1.1

Question 8

A child weighs 40 kg, and the recommended dosage of Cleocin (clindamycin palmitate hydrochloride) oral suspension is 8 to 25 mg/kg/day in four divided doses. What is the maximum dosage for this child in 24 hours?

A) 320
B) 500
C) 640
D) 1000

Question 9

A child weighs 88 lb and has an order for morphine sulfate 7.5 mg subcutaneously every 8 hours prn. The recommended maximum dose for a child is 0.1 to 0.2 mg/kg/dose. What is the safe dosage range for this child?

A) 2 to 4
B) 3 to 5
C) 5 to 7
D) 4 to 8

Question 10

A child weighs 18 kg and has an order for Zithromax 10 mg/kg po stat. The recommended dosage is 10 mg/kg/day. The oral suspension is dispensed as 200 mg in 5 mL. How many milliliters should the nurse administer in one dose? Use the proportion (ratios) method to calculate the amount to give.

A) 4.3
B) 4.4
C) 4.5
D) 4.6

Question 11

Using the nomogram in the textbook (Fig. 8-10), what is the body surface area (BSA) for a child who weighs 60 lb and is 39 inches tall?

A) 0.6 m²
B) 0.7 m²
C) 0.8 m²
D) 0.9 m²

Question 12

A child has a body surface area (BSA) of 0.75 m² and a medication order for Cosmegen (dactinomycin) 0.5 mg/m² daily for 5 days IV push. How many milligrams should the nurse administer daily?

A) 0.27
B) 0.36
C) 0.375
D) 0.45

Question 13

A child weighs 20 lb and is 30 inches tall. The dosage for the medication is 20 mg/m²/dose four times a day. How many milligrams of medication are administered per dose?

A) 8
B) 9
C) 10
D) 11

Question 14

A child weighs 44 lb and has an order for IV methylprednisolone sodium succinate (Solu-Medrol). The order is for 0.03 mg/kg/day. How many milligrams of medication should be administered?

A) 0.4
B) 0.5
C) 0.6
D) 0.7

Question 15

A child weighs 95 lb and has an order for IV tobramycin (Nebcin). The order is for 3 mg/kg/day in three divided doses. How many milligrams of medication should be administered per dose?

A) 43.18
B) 86.42
C) 129.60
D) 172.83

Question 16

A child's weight is 50 lb and his height is 36 inches. The dosage for his medication is 25 mg/m²/dose four times a day. What is the child's body surface area (BSA)?

A) 0.8
B) 0.9
C) 1
D) 1.1

Question 17

A child weighs 20 kg and has an order for Garamycin (gentamicin) 40 mg IV piggyback every 8 hours. The recommended dosage range is 2 to 2.5 mg/kg every 8 hours. The medication is supplied in 20-mg vials with a strength of 10 mg/mL. How many milliliters would the nurse withdraw from the vial? Use dimensional analysis to calculate the amount to give.

A) 2.5
B) 3
C) 3.5
D) 4

Question 18

The nurse has administered a parenteral IV piggyback to a child. At the completion of the IV, how many milliliters of flush are added to the Buretrol to clear the tubing of the medication?

A) 10
B) 15
C) 20
D) 25

Question 19

The dose of continuous IV dosages is based on which measurement of weight?

A) Kilograms
B) Milligrams
C) Ounces
D) Pounds

Question 20

An infant weighs 22 lb and has an order for NS to be infused at 5 mL/kg/hour. How many milliliters per hour should the nurse infuse the IV solution?

A) 40
B) 45
C) 50
D) 55

Question 21

The physician ordered 5 mg/kg of a medication for a toddler who weighed 26 pounds. How many milligrams of the medication would the nurse prepare?

A) 52.27
B) 54.54
C) 56.81
D) 59.1

Question 22

The physician ordered Aldactone (spironolactone) 15 mg twice daily for a child who weighs 42 lb. The safe dosage range is 1 to 2 mg/kg/day. What is the safe dosage range, per dose, for this child?

A) 18.63 to 37.27
B) 9.55 to 19.09
C) 19.54 to 39.09
D) 20 to 40

Question 23

The physician prescribed Vancocin (vancomycin) 25 mg/kg/day po. The child weighed 54 pounds. The safe dosage for this drug is 40 mg/kg/24 hours, in four equal doses, not to exceed 2 g/day. How many milligrams per day is the safe dosage for this child?

A) 907.98
B) 932.52
C) 957.06
D) 982

Question 24

The physician ordered Lasix (furosemide) 2.5 mg/kg q 8 hours for a child who weighs 28 lb. The safe dosage range is 3 to 6 mg/kg/q8h. What is the safe dosage range for this child?

A) 25.46 to 50.92
B) 31.82 to 63.65
C) 38.19 to 76.38
D) 76.38 to 84.68

Question 25

The physician ordered Lasix (furosemide) 2.5 mg/kg, q 8 hours for a child who weighs 28 pounds. The safe dosage range is 3 to 6 mg/kg/q8h. How many milligrams of Lasix should the nurse administer for each dose? Round to the nearest whole number.

A) 25
B) 32
C) 38
D) 45

Question 26

A child weighs 44 lb and has an order for Augmentin (amoxicillin clavulanate potassium) 100 mg po every 8 hours. The literature states the safe dose should range from 6.7 to 13.3 mg/kg/q8h. The Augmentin label reads 125 mg/5 mL. How many milliliters would be given for each dose? Is it within the daily safe dosage? Use the Formula Method to solve this problem.

A) 2; safe
B) 4; safe
C) 6; not safe
D) 8; not safe

Question 27

A child weighs 50 lb and has an order for Valium (diazepam) 2 mg, PO, tid. The safe dosage for children is 1 to 2.5 mg, tid or qid. What is the total daily dosage for this child? Is it safe?

A) 4; safe
B) 6; safe
C) 8; not safe
D) 10; not safe

Question 28

A child weighs 40 lb and is 32 inches tall. The dosage for the medication is 30 mg/m²/dose two times a day. How many milligrams of medication are administered per dose?

A) 18
B) 19
C) 20
D) 21

Question 29

A child weighs 33 lb and has an order for D5 ½ NS to be infused at 8 mL/kg/hour. How many milliliters per hour should the nurse infuse the IV solution?

A) 80
B) 100
C) 120
D) 140

Question 30

The physician ordered Lasix (furosemide) 20 mg q 8 hours as a single dose for a child who weighs 22 lb. The safe dosage range is 2 mg/kg. Is this dose safe? Lasix is available as an oral solution 10 mg/mL. How many mL should the child receive? Use the Formula Method for your calculations.

A) 1; safe
B) 1; not safe
C) 2; safe
D) 2; not safe