Question

A nurse is preparing to administer amoxicillin 30 mg/kg/day divided equally every 12 hr to a toddler who weighs 33 lb. Available is amoxicillin 200 mg/5 mL suspension. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Answer 1

Correct Answers:

5.6

Rationale :

🔷 Step 1: Convert the toddler’s weight from pounds to kilograms

33 lb ÷ 2.2 = 15 kg

🔷 Step 2: Calculate the total daily dose

30 mg × 15 kg = 450 mg/day

🔷 Step 3: Divide the total daily dose into two equal doses (every 12 hr)

450 mg ÷ 2 = 225 mg per dose

🔷 Step 4: Identify the available concentration

Available dose = 200 mg per 5 mL

🔷 Step 5: Set up the calculation to find mL per dose

225 mg ÷ 200 mg = 1.125

🔷 Step 6: Calculate the volume to administer

1.125 × 5 mL = 5.625 mL

🔷 Step 7: Round to the nearest tenth

5.625 mL rounded to the nearest tenth = 5.6 mL

Final Answer:

5.6 mL

Distractor Analysis :

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Answer 2

Correct Answers:

0.2

Rationale :

🔷 Step 1: Identify the prescribed dose

Prescribed dose = 2 mg

🔷 Step 2: Identify the available concentration

Available dose = 10 mg per 1 mL

🔷 Step 3: Set up the calculation

2 mg ÷ 10 mg = 0.2

🔷 Step 4: Determine the volume to administer

0.2 × 1 mL = 0.2 mL

🔷 Step 5: Round to the nearest tenth

0.2 mL rounded to the nearest tenth = 0.2 mL

Final Answer:

0.2 mL

Distractor Analysis :

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Answer 3

Correct Answers:

8

Rationale :

🔷 Step 1: Identify the prescribed dose per administration

Prescribed dose = 400 mg (PO bid means each dose is 400 mg)

🔷 Step 2: Identify the available concentration

Available dose = 250 mg per 5 mL

🔷 Step 3: Set up the calculation

400 mg ÷ 250 mg = 1.6

🔷 Step 4: Calculate the volume to administer

1.6 × 5 mL = 8 mL

🔷 Step 5: Round if needed

8 mL rounded to the nearest whole number = 8 mL

Final Answer:

8 mL

Distractor Analysis :

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Answer 4

Correct Answers:

0.5

Rationale :

🔷 Step 1: Identify the prescribed dose

Prescribed dose = 1 mg

🔷 Step 2: Identify the available concentration

Available dose = 1 mg per 0.5 mL

🔷 Step 3: Set up the calculation

1 mg ÷ 1 mg = 1

🔷 Step 4: Determine the volume to administer

1 × 0.5 mL = 0.5 mL

🔷 Step 5: Round to the nearest tenth

0.5 mL rounded to the nearest tenth = 0.5 mL

Final Answer:

0.5 mL

Distractor Analysis :

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Answer 5

Correct Answers:

100

Rationale :

🔷 Step 1: Identify the total volume to be infused

Total volume = 50 mL

🔷 Step 2: Identify the infusion time

Infusion time = 30 minutes

🔷 Step 3: Convert minutes to hours

30 minutes ÷ 60 = 0.5 hour

🔷 Step 4: Use the IV rate formula

mL/hr = Total mL ÷ Hours

mL/hr = 50 mL ÷ 0.5 hr = 100 mL/hr

🔷 Step 5: Round if needed

100 mL/hr rounded to the nearest whole number = 100 mL/hr

Final Answer:

100 mL/hr

Distractor Analysis :

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Answer 6

Correct Answers:

75

Rationale :

🔷 Step 1: Identify the total volume to infuse

Total volume = 100 mL

🔷 Step 2: Identify the drop factor

Drop factor = 15 gtt/mL

🔷 Step 3: Identify the infusion time in minutes

Infusion time = 20 min

🔷 Step 4: Use the formula for gravity IV infusion rate

gtt/min = (mL × gtt/mL) ÷ min

gtt/min = (100 mL × 15 gtt/mL) ÷ 20 min

🔷 Step 5: Calculate

100 × 15 = 1500 gtt

1500 ÷ 20 = 75 gtt/min

🔷 Step 6: Round if needed

75 gtt/min rounded to the nearest whole number = 75 gtt/min

Final Answer:

75 gtt/min

Distractor Analysis :

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Answer 7

Correct Answers:

4

Rationale :

🔷 Step 1: Identify the prescribed dose

Prescribed dose = 320 mg

🔷 Step 2: Identify the available concentration

Available dose = 400 mg per 5 mL

🔷 Step 3: Set up the calculation

320 mg ÷ 400 mg = 0.8

🔷 Step 4: Calculate the volume to administer

0.8 × 5 mL = 4 mL

🔷 Step 5: Round to the nearest tenth

4 mL rounded to the nearest tenth = 4.0 mL → 4 mL (no trailing zero)

Final Answer:

4 mL

Distractor Analysis :

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Answer 8

Correct Answers:

2

Rationale :

🔷 Step 1: Identify the prescribed dose

Prescribed dose = 300 mg

🔷 Step 2: Identify the available dose per capsule

Available dose = 150 mg per capsule

🔷 Step 3: Calculate the number of capsules needed

300 mg ÷ 150 mg = 2

🔷 Step 4: Round if needed

2 rounded to the nearest whole number = 2

Final Answer:

2 capsules

Distractor Analysis :

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Answer 9

Correct Answers:

2

Rationale :

🔷 Step 1: Identify the prescribed dose

Prescribed dose = 50 mg

🔷 Step 2: Identify the available dose per tablet

Available dose = 25 mg per tablet

🔷 Step 3: Calculate the number of tablets needed

50 mg ÷ 25 mg = 2

🔷 Step 4: Round if needed

2 rounded to the nearest whole number = 2

Final Answer:

2 tablets

Distractor Analysis :

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Answer 10

Correct Answers:

8

Rationale :

🔷 Step 1: Identify the prescribed dose per administration

Prescribed dose = 400 mg

(PO bid means 400 mg per dose)

🔷 Step 2: Identify the available concentration

Available dose = 250 mg per 5 mL

🔷 Step 3: Set up the calculation

400 mg ÷ 250 mg = 1.6

🔷 Step 4: Calculate the volume to administer

1.6 × 5 mL = 8 mL

🔷 Step 5: Round if needed

8 mL rounded to the nearest whole number = 8 mL

Final Answer:

8 mL

Distractor Analysis :

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Dosage calculation Spring -2026

No.

2 :
A nurse is preparing to administer morphine sulfate 2 mg IV bolus. Available is morphine sulfate 10 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

3 :
A nurse is preparing to administer valproic acid 400 mg PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

4 :
A nurse is preparing to administer 1 mg vitamin K to a newborn. The medication is available in 1 mg/0.5 mL. How much should the nurse administer? (Round to the nearest tenth. Use a leading zero when applicable. Do not use a trailing zero.)

7 :
A nurse is preparing to administer amoxicillin 320 mg PO every 12 hr to an infant. The amount available is amoxicillin suspension 400 mg/5 mL. How many mL should the nurse administer per dose? (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 lithium 300 mg PO every 8 hr. Available is lithium carbonate 150 mg capsules. How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

10 :
A nurse is preparing to administer valproic acid 400 mg PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

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Dosage calculation Spring -2026

No.

2 : A nurse is preparing to administer morphine sulfate 2 mg IV bolus. Available is morphine sulfate 10 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

3 : A nurse is preparing to administer valproic acid 400 mg PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

4 : A nurse is preparing to administer 1 mg vitamin K to a newborn. The medication is available in 1 mg/0.5 mL. How much should the nurse administer? (Round to the nearest tenth. Use a leading zero when applicable. Do not use a trailing zero.)

7 : A nurse is preparing to administer amoxicillin 320 mg PO every 12 hr to an infant. The amount available is amoxicillin suspension 400 mg/5 mL. How many mL should the nurse administer per dose? (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 lithium 300 mg PO every 8 hr. Available is lithium carbonate 150 mg capsules. How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

10 : A nurse is preparing to administer valproic acid 400 mg PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many mL should the nurse administer per dose? (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 morphine sulfate 2 mg IV bolus. Available is morphine sulfate 10 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

3 :
A nurse is preparing to administer valproic acid 400 mg PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

4 :
A nurse is preparing to administer 1 mg vitamin K to a newborn. The medication is available in 1 mg/0.5 mL. How much should the nurse administer? (Round to the nearest tenth. Use a leading zero when applicable. Do not use a trailing zero.)

7 :
A nurse is preparing to administer amoxicillin 320 mg PO every 12 hr to an infant. The amount available is amoxicillin suspension 400 mg/5 mL. How many mL should the nurse administer per dose? (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 lithium 300 mg PO every 8 hr. Available is lithium carbonate 150 mg capsules. How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

10 :
A nurse is preparing to administer valproic acid 400 mg PO bid for migraine headaches. Available is valproic acid 250 mg/5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)