Question

A nurse is preparing to administer phenytoin 15 mg/kg PO to a school-age child who weighs 55 Ib. Available is phenytoin suspension 125 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Answer 1

Correct Answers:

15

Rationale :

✔️Formula:

✔️mL=Dose ordered/Dose available ×Volume available

✔️55 lb÷2.2=25 kg

✔️15 mg×25 kg=375 mg

✔️375 mg/125 mg×5 mL

✍️15 mL

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Answer 2

Correct Answers:

83

Rationale :

✳️Formula:

✳️mL/hr=Total volume/Infusion time

✳️1,000 mL÷12 hr

🔷83.33 mL/hr

🔷Rounded to the nearest whole number: 83 mL/hr

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Answer 3

Correct Answers:

0.3

Rationale :

✔️Formula:

✔️mL=Dose ordered/Dose available ×Volume available

✔️15 mg/50 mg×1 mL

📌0.3 mL

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Answer 4

Correct Answers:

2.1

Rationale :

✔️Ordered: 50,000 units/kg IM

✔️ Weight: 55 lb

✔️ Available: 600,000 units/mL

✔️Formula:

✔️mL=Desired units/Available units×Available volume

✔️55 lb÷2.2=25 kg

✔️50,000 units×25 kg=1,250,000 units

✔️1,250,000 units/600,000 units×1 mL

💎2.083 mL

💎Rounded to the nearest tenth: 2.1 mL

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Answer 5

Correct Answers:

0.8

Rationale :

➡️Ordered: 12 mg IV

➡️Available: 15 mg/mL

➡️Formula:

➡️mL=Desired dose/Available dose×Available volume

➡️12 mg/15 mg×1 mL

🔶0.8 mL

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Answer 6

Correct Answers:

10

Rationale :

✍️Ordered: 50 mg/kg/day PO every 12 hr

✍️Weight: 44 lb

✍️Available: 250 mg/5 mL

✍️Formula:

🔷mL per dose=Dose per administration/Available dose×Available volume

🔷44 lb÷2.2=20 kg

🔷50 mg×20 kg=1,000 mg/day

🔷Every 12 hours means 2 doses per day:

🔷1,000 mg/day÷2=500 mg per dose

🔷500 mg/250 mg×5 mL

📌10 mL

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Answer 7

Correct Answers:

35

Rationale :

➡️Ordered: 40 mg/kg IV every 8 hr

➡️ Weight: 77 lb

➡️Available: 40 mg/mL

➡️Formula:

➡️mL=Desired dose/Available concentration

➡️77 lb÷2.2=35 kg

➡️40 mg×35 kg=1,400 mg

➡️1,400 mg÷40 mg/mL

✔️35 mL

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Answer 8

Correct Answers:

1.3

Rationale :

💎Ordered: 2 mg/kg IM

💎 Weight: 55 lb

💎 Available: 40 mg/mL

💎Formula:

💎mL=Desired dose/Available concentration

💎55 lb÷2.2=25 kg

💎2 mg×25 kg=50 mg

💎50 mg÷40 mg/mL

🔶1.25 mL

🔶Rounded to the nearest tenth:1.3 mL

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Answer 9

Correct Answers:

1.5

Rationale :

✍️Amount available: 7.5 mL

✍️Conversion: 1 tsp = 5 mL

✍️Formula:

🔷tsp= mL/5mL/tsp

🔷7.5 mL÷5 mL/tsp

📌1.5 tsp

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Answer 10

Correct Answers:

2.3

Rationale :

➡️Ordered: 10 mg/kg IM

➡️Weight: 77 lb

➡️Available: Clindamycin 150 mg/mL

➡️Formula:

➡️mL=Desired dose/Available concentration

➡️77 lb÷2.2=35 kg

➡️10 mg×35 kg=350 mg

➡️350 mg÷150 mg/mL

✔️2.33 mL

✔️Rounded to the nearest tenth: 2.3 mL

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RN Pediatric Dosage calculation Proctored assessment 3.5 - summer 2026

No.

1 :
A nurse is preparing to administer phenytoin 15 mg/kg PO to a school-age child who weighs 55 Ib. Available is phenytoin suspension 125 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

2 :
A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 12 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

3 :
A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

5 :
A nurse is preparing to administer ketorolac 12 mg IV bolus to an adolescent. The amount available is ketorolac injection 15 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

8 :
A nurse is preparing to administer gentamicin 2 mg/kg IM to a school-age child who weighs 55 Ib. Available is gentamicin injection 40 mg/mL. How many mi should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

9 :
A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension to a toddler who has otitis media. The nurse should recognize that 7.5 ml is equivalent to how many tsp? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

10 :
A nurse is preparing to administer clindamycin 10 mg/kg IM to a school-age child who weighs 77 lb. Available is clindamycin injection 150 mg/ml. How many ml should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

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RN Pediatric Dosage calculation Proctored assessment 3.5 - summer 2026

No.

1 : A nurse is preparing to administer phenytoin 15 mg/kg PO to a school-age child who weighs 55 Ib. Available is phenytoin suspension 125 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

2 : A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 12 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

3 : A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

5 : A nurse is preparing to administer ketorolac 12 mg IV bolus to an adolescent. The amount available is ketorolac injection 15 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

8 : A nurse is preparing to administer gentamicin 2 mg/kg IM to a school-age child who weighs 55 Ib. Available is gentamicin injection 40 mg/mL. How many mi should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

9 : A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension to a toddler who has otitis media. The nurse should recognize that 7.5 ml is equivalent to how many tsp? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

10 : A nurse is preparing to administer clindamycin 10 mg/kg IM to a school-age child who weighs 77 lb. Available is clindamycin injection 150 mg/ml. How many ml should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

1 :
A nurse is preparing to administer phenytoin 15 mg/kg PO to a school-age child who weighs 55 Ib. Available is phenytoin suspension 125 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

2 :
A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 12 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

3 :
A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

5 :
A nurse is preparing to administer ketorolac 12 mg IV bolus to an adolescent. The amount available is ketorolac injection 15 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

8 :
A nurse is preparing to administer gentamicin 2 mg/kg IM to a school-age child who weighs 55 Ib. Available is gentamicin injection 40 mg/mL. How many mi should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

9 :
A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension to a toddler who has otitis media. The nurse should recognize that 7.5 ml is equivalent to how many tsp? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

10 :
A nurse is preparing to administer clindamycin 10 mg/kg IM to a school-age child who weighs 77 lb. Available is clindamycin injection 150 mg/ml. How many ml should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)