NR 442 Medication Calculation Exam 2026|
Chamberlain University| Actual Exam
Questions and Correct Answers
Question: The healthcare provider ordered acetaminophen 15 mg/kg. The client weighs 77 lbs.
How many mg will the nurse administer? (If needed, round to the nearest tenth.)
Answer: 525 mg
Explanation: Convert weight to kg: 77 lbs ÷ 2.2 = 35 kg. Calculate dose: 15 mg/kg × 35 kg =
525 mg. No rounding needed.
Question: The client has an order for amiodarone to infuse at 1 mg/min IV. Available is
amiodarone 300 mg/150 mL in dextrose 5%. At what rate will the nurse infuse the medication?
Answer: 30 mL/hr
Explanation: Concentration: 300 mg ÷ 150 mL = 2 mg/mL. Rate in mL/min: 1 mg/min ÷ 2
mg/mL = 0.5 mL/min. Convert to mL/hr: 0.5 mL/min × 60 min/hr = 30 mL/hr.
Question: The healthcare provider ordered cefotaxime 150 mg/kg/day IV divided into 3 doses.
The client weighs 33 lbs. How many mg will the nurse administer for each dose?
Answer: 750 mg
Explanation: Convert weight to kg: 33 lbs ÷ 2.2 = 15 kg. Daily dose: 150 mg/kg/day × 15 kg =
2250 mg/day. Per dose: 2250 mg/day ÷ 3 = 750 mg.
Question: The client has an order for cephalexin 300 mg orally. The medication available is
cephalexin 500 mg/5 mL. How many mL will the nurse administer?
Answer: 3 mL
Explanation: Concentration: 500 mg ÷ 5 mL = 100 mg/mL. Volume: 300 mg ÷ 100 mg/mL = 3
mL.
Question: The healthcare provider ordered diphenhydramine 10 mg IM. The medication
available is diphenhydramine 50 mg/mL. How many mL will the nurse administer?
,Answer: 0.2 mL
Explanation: Volume: 10 mg ÷ 50 mg/mL = 0.2 mL.
Question: The healthcare provider ordered dopamine 4 mcg/kg/min. The client weighs 155 lbs.
The pharmacy delivered dopamine 400 mg /250 mL in 0.45% sodium chloride. At what rate will
the nurse set the infusion? (If needed, round to the nearest tenth.)
Answer: 10.6 mL/hr
Explanation: Convert weight to kg: 155 lbs ÷ 2.2 = 70.45 kg (round to 70.5 kg for calculation).
Dose per min: 4 mcg/kg/min × 70.5 kg = 282 mcg/min. Convert to mg/min: 282 mcg/min ÷ 1000
= 0.282 mg/min. Concentration: 400 mg ÷ 250 mL = 1.6 mg/mL. Rate in mL/min: 0.282 mg/min
÷ 1.6 mg/mL = 0.176 mL/min. Convert to mL/hr: 0.176 mL/min × 60 = 10.6 mL/hr.
Question: The healthcare provider ordered enoxaparin 1 mg/kg subcutaneously. The client
weighs 99 lbs. The pharmacy delivers enoxaparin 40 mg/0.4 mL. How many mL will the nurse
administer?
Answer: 0.45 mL
Explanation: Convert weight to kg: 99 lbs ÷ 2.2 = 45 kg. Dose: 1 mg/kg × 45 kg = 45 mg.
Concentration: 40 mg ÷ 0.4 mL = 100 mg/mL. Volume: 45 mg ÷ 100 mg/mL = 0.45 mL.
Question: The healthcare provider ordered filgrastim 5 mcg/kg/day IV. The medication available
is filgrastim 300 mcg/1 mL. The client weighs 187 lbs. How many mL will the nurse administer?
Answer: 1.4 mL
Explanation: Convert weight to kg: 187 lbs ÷ 2.2 = 85 kg. Dose: 5 mcg/kg × 85 kg = 425 mcg.
Volume: 425 mcg ÷ 300 mcg/mL = 1.4167 mL (round to 1.4 mL if nearest tenth, but typically
exact; question implies as is).
Question: The client has an order for glipizide 20 mg PO. The medication available is glipizide 5
mg scored tablets. How many tablets will the nurse administer?
Answer: 4 tablets
Explanation: Tablets: 20 mg ÷ 5 mg/tablet = 4 tablets.
Question: The client has an order for heparin 5,500 units IVP. The medication available is
heparin 10,000 units/1 mL. How many mL will the nurse administer?
, Answer: 0.55 mL
Explanation: Volume: 5500 units ÷ 10000 units/mL = 0.55 mL.
Question: The healthcare provider ordered heparin 1,300 units/hr. The medication available is
heparin 50,000 units/500 mL 0.9% sodium chloride. At what rate will the nurse set the infusion?
Answer: 13 mL/hr
Explanation: Concentration: 50000 units ÷ 500 mL = 100 units/mL. Rate: 1300 units/hr ÷ 100
units/mL = 13 mL/hr.
Question: The healthcare provider ordered isoniazid 6 mg/kg. The client weighs 44 kg. The
medication available is isoniazid 100 mg scored tablets. How many tablets will the nurse
administer?
Answer: 2.64 tablets (but typically round to practical; question implies calculate, perhaps 2.6 or
3 if scored)
Explanation: Dose: 6 mg/kg × 44 kg = 264 mg. Tablets: 264 mg ÷ 100 mg/tablet = 2.64 tablets.
Since scored, can give 2.5 or adjust, but exact calc is 2.64.
Question: The client has an order for lidocaine to infuse at 3.75 mg/min IV. The medication
available is lidocaine 2 g/250 mL dextrose 5%. At what rate will the nurse set the infusion?
(Round to nearest whole number.)
Answer: 28 mL/hr
Explanation: Convert 2 g = 2000 mg. Concentration: 2000 mg ÷ 250 mL = 8 mg/mL. Rate in
mL/min: 3.75 mg/min ÷ 8 mg/mL = 0.46875 mL/min. To mL/hr: 0.46875 × 60 = 28.125 mL/hr
(round to 28).
Question: The client has an order for Lactated Ringers 1,500 mL to infuse over 12 hours. The
available tubing delivers 15 gtt/mL. At what rate will the nurse set the infusion?
Answer: 31 gtt/min
Explanation: Rate in mL/hr: 1500 mL ÷ 12 hr = 125 mL/hr. Drops per hr: 125 mL/hr × 15
gtt/mL = 1875 gtt/hr. Per min: 1875 ÷ 60 = 31.25 gtt/min (round to 31 if whole).
Question: The client has an order for methylphenidate 30 mg orally. The medication available is
methylphenidate 10 mg per scored tablet. How many tablets will the nurse administer?
Chamberlain University| Actual Exam
Questions and Correct Answers
Question: The healthcare provider ordered acetaminophen 15 mg/kg. The client weighs 77 lbs.
How many mg will the nurse administer? (If needed, round to the nearest tenth.)
Answer: 525 mg
Explanation: Convert weight to kg: 77 lbs ÷ 2.2 = 35 kg. Calculate dose: 15 mg/kg × 35 kg =
525 mg. No rounding needed.
Question: The client has an order for amiodarone to infuse at 1 mg/min IV. Available is
amiodarone 300 mg/150 mL in dextrose 5%. At what rate will the nurse infuse the medication?
Answer: 30 mL/hr
Explanation: Concentration: 300 mg ÷ 150 mL = 2 mg/mL. Rate in mL/min: 1 mg/min ÷ 2
mg/mL = 0.5 mL/min. Convert to mL/hr: 0.5 mL/min × 60 min/hr = 30 mL/hr.
Question: The healthcare provider ordered cefotaxime 150 mg/kg/day IV divided into 3 doses.
The client weighs 33 lbs. How many mg will the nurse administer for each dose?
Answer: 750 mg
Explanation: Convert weight to kg: 33 lbs ÷ 2.2 = 15 kg. Daily dose: 150 mg/kg/day × 15 kg =
2250 mg/day. Per dose: 2250 mg/day ÷ 3 = 750 mg.
Question: The client has an order for cephalexin 300 mg orally. The medication available is
cephalexin 500 mg/5 mL. How many mL will the nurse administer?
Answer: 3 mL
Explanation: Concentration: 500 mg ÷ 5 mL = 100 mg/mL. Volume: 300 mg ÷ 100 mg/mL = 3
mL.
Question: The healthcare provider ordered diphenhydramine 10 mg IM. The medication
available is diphenhydramine 50 mg/mL. How many mL will the nurse administer?
,Answer: 0.2 mL
Explanation: Volume: 10 mg ÷ 50 mg/mL = 0.2 mL.
Question: The healthcare provider ordered dopamine 4 mcg/kg/min. The client weighs 155 lbs.
The pharmacy delivered dopamine 400 mg /250 mL in 0.45% sodium chloride. At what rate will
the nurse set the infusion? (If needed, round to the nearest tenth.)
Answer: 10.6 mL/hr
Explanation: Convert weight to kg: 155 lbs ÷ 2.2 = 70.45 kg (round to 70.5 kg for calculation).
Dose per min: 4 mcg/kg/min × 70.5 kg = 282 mcg/min. Convert to mg/min: 282 mcg/min ÷ 1000
= 0.282 mg/min. Concentration: 400 mg ÷ 250 mL = 1.6 mg/mL. Rate in mL/min: 0.282 mg/min
÷ 1.6 mg/mL = 0.176 mL/min. Convert to mL/hr: 0.176 mL/min × 60 = 10.6 mL/hr.
Question: The healthcare provider ordered enoxaparin 1 mg/kg subcutaneously. The client
weighs 99 lbs. The pharmacy delivers enoxaparin 40 mg/0.4 mL. How many mL will the nurse
administer?
Answer: 0.45 mL
Explanation: Convert weight to kg: 99 lbs ÷ 2.2 = 45 kg. Dose: 1 mg/kg × 45 kg = 45 mg.
Concentration: 40 mg ÷ 0.4 mL = 100 mg/mL. Volume: 45 mg ÷ 100 mg/mL = 0.45 mL.
Question: The healthcare provider ordered filgrastim 5 mcg/kg/day IV. The medication available
is filgrastim 300 mcg/1 mL. The client weighs 187 lbs. How many mL will the nurse administer?
Answer: 1.4 mL
Explanation: Convert weight to kg: 187 lbs ÷ 2.2 = 85 kg. Dose: 5 mcg/kg × 85 kg = 425 mcg.
Volume: 425 mcg ÷ 300 mcg/mL = 1.4167 mL (round to 1.4 mL if nearest tenth, but typically
exact; question implies as is).
Question: The client has an order for glipizide 20 mg PO. The medication available is glipizide 5
mg scored tablets. How many tablets will the nurse administer?
Answer: 4 tablets
Explanation: Tablets: 20 mg ÷ 5 mg/tablet = 4 tablets.
Question: The client has an order for heparin 5,500 units IVP. The medication available is
heparin 10,000 units/1 mL. How many mL will the nurse administer?
, Answer: 0.55 mL
Explanation: Volume: 5500 units ÷ 10000 units/mL = 0.55 mL.
Question: The healthcare provider ordered heparin 1,300 units/hr. The medication available is
heparin 50,000 units/500 mL 0.9% sodium chloride. At what rate will the nurse set the infusion?
Answer: 13 mL/hr
Explanation: Concentration: 50000 units ÷ 500 mL = 100 units/mL. Rate: 1300 units/hr ÷ 100
units/mL = 13 mL/hr.
Question: The healthcare provider ordered isoniazid 6 mg/kg. The client weighs 44 kg. The
medication available is isoniazid 100 mg scored tablets. How many tablets will the nurse
administer?
Answer: 2.64 tablets (but typically round to practical; question implies calculate, perhaps 2.6 or
3 if scored)
Explanation: Dose: 6 mg/kg × 44 kg = 264 mg. Tablets: 264 mg ÷ 100 mg/tablet = 2.64 tablets.
Since scored, can give 2.5 or adjust, but exact calc is 2.64.
Question: The client has an order for lidocaine to infuse at 3.75 mg/min IV. The medication
available is lidocaine 2 g/250 mL dextrose 5%. At what rate will the nurse set the infusion?
(Round to nearest whole number.)
Answer: 28 mL/hr
Explanation: Convert 2 g = 2000 mg. Concentration: 2000 mg ÷ 250 mL = 8 mg/mL. Rate in
mL/min: 3.75 mg/min ÷ 8 mg/mL = 0.46875 mL/min. To mL/hr: 0.46875 × 60 = 28.125 mL/hr
(round to 28).
Question: The client has an order for Lactated Ringers 1,500 mL to infuse over 12 hours. The
available tubing delivers 15 gtt/mL. At what rate will the nurse set the infusion?
Answer: 31 gtt/min
Explanation: Rate in mL/hr: 1500 mL ÷ 12 hr = 125 mL/hr. Drops per hr: 125 mL/hr × 15
gtt/mL = 1875 gtt/hr. Per min: 1875 ÷ 60 = 31.25 gtt/min (round to 31 if whole).
Question: The client has an order for methylphenidate 30 mg orally. The medication available is
methylphenidate 10 mg per scored tablet. How many tablets will the nurse administer?
