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NABP NAPLEX Exam - Topic 5 Question 116 Discussion

An order is received to start Milrinone at 0.75mcg/kg/min, Milrinone comes as 20mg/100ml D5W. What is the infusion rate in mL/hr? Patient weighs 115kg.
C) 25.9 mls/hr
A) 86 mls/hr
B) 13 mls/hr
D) 43 mls/hr
E) 7 mls/hr

NABP NAPLEX Exam - Topic 5 Question 116 Discussion

Actual exam question for NABP's NAPLEX exam
Question #: 116
Topic #: 5
[All NAPLEX Questions]

An order is received to start Milrinone at 0.75mcg/kg/min, Milrinone comes as 20mg/100ml D5W. What is the infusion rate in mL/hr? Patient weighs 115kg.

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Suggested Answer: C

Patient dose: 0.75mcg 115kg = 86.25mcg/min (100mL/20mg) (86.25mcg/1hr) (60min/1hr) (1mg/1000mcg) = 25.875mL/hr Rate of infusion of Milrinone


by Geoffrey at Mar 08, 2026, 08:47 AM

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Felix
I feel like it's A) 86 mls/hr. The weight really matters here.
upvoted 0 times
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Amira
5 days ago
This question is tricky! I think I need to calculate carefully.
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Anjelica
10 days ago
Milrinone is 20mg in 100ml D5W, just remember that!
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Vonda
15 days ago
Wait, are we sure about the calculations?
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Helga
2 months ago
I think it’s around 43 mls/hr, right?
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Shay
2 months ago
That’s definitely not 86 mls/hr.
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Dewitt
2 months ago
The dose is 0.75 mcg/kg/min for a 115 kg patient.
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Leanora
3 months ago
Just did the math, it's definitely 43 mls/hr!
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Felicitas
3 months ago
86 mls/hr? That seems way too high.
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Stephaine
3 months ago
Wait, how did you get that? I thought it was lower.
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Lonny
3 months ago
I think it's around 43 mls/hr, sounds about right.
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Rodrigo
3 months ago
The dose is 0.75 mcg/kg/min for 115 kg, right?
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Janella
3 months ago
I feel like I should be able to do this, but I can't recall the exact steps to get from mcg to mL. I hope I remember the formula correctly!
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Charisse
4 months ago
If the patient weighs 115kg, I think I need to multiply that by the dosage rate first, but I'm a bit confused about how to handle the units.
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Tegan
4 months ago
I think I saw a similar question where we had to calculate the rate based on weight. I need to remember the conversion factors.
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Micheline
4 months ago
I remember we practiced calculating infusion rates, but I'm not entirely sure how to convert mcg/kg/min to mL/hr.
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