Hesi BSN 215 RN Dosage Calculation
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Over 200 Actual Dosage Calculation Questions covering essential topics like oral and parenteral medication dosages, IV flow rates, weight-based dosing, and safe medication administration — all with detailed, step-by-step answer breakdowns.
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Free Hesi BSN 215 RN Dosage Calculation Questions
A client who weighs 176 pounds receives a prescription for filgrastim 5 mcg/kg/daily subcutaneously for 14 days. The medication is available in a 300 mcg/mL vial. How many mL should the nurse administer
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1.1 mL
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1.3 mL
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1.5 mL
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1.6 mL
Explanation
Correct Answer B: 1.3 mL
Explanation:
Step 1: Convert pounds to kilograms
176 lb ÷ 2.2 = 80 kg
Step 2: Calculate the dose
5 mcg × 80 kg = 400 mcg
Step 3: Use the concentration to calculate mL
400 mcg ÷ 300 mcg/mL = 1.33 mL, rounded to the nearest tenth = 1.3 mL
Why the Other Options Are Incorrect:
A. 1.1 mL
This delivers only 330 mcg, which is less than the prescribed 400 mcg.
C. 1.5 mL
This delivers 450 mcg (300 × 1.5), exceeding the required dose.
D. 1.6 mL
This would administer 480 mcg, which is 80 mcg over the prescribed amount.
A child receives a prescription for loratadine 5 mg by mouth once a day. The bottle is labeled "Loratadine for Oral Suspension, USP 5 mg per 5 mL." How many teaspoons should the nurse instruct the parent to administer with each dose
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0.5 tsp
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1 tsp
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1.5 tsp
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2 tsp
Explanation
Correct Answer B: 1 tsp
Explanation:
The prescribed dose is 5 mg.
The concentration on the label is 5 mg per 5 mL.
So, the parent should give 5 mL to provide 5 mg.
Since 1 teaspoon = 5 mL, the correct dose is 1 tsp.
Why the Other Options Are Incorrect:
A. 0.5 tsp
This would provide only 2.5 mL, or 2.5 mg—half the prescribed dose.
C. 1.5 tsp
This equals 7.5 mL, or 7.5 mg—exceeding the ordered amount.
D. 2 tsp
This equals 10 mL, or 10 mg—double the prescribed dose, which could risk overdose.
A client is receiving a secondary infusion of azithromycin 500 mg in 500 mL of normal saline (NS) to be infused over 2 hours. How many mL/hour should the nurse program the infusion pump
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200 mL/hr
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225 mL/hr
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250 mL/hr
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275 mL/hr
Explanation
Correct Answer C: 250 mL/hr
Explanation:
To calculate the rate for infusion:
Total volume ÷ Time = mL/hour
500 mL ÷ 2 hours = 250 mL/hr
Why the Other Options Are Incorrect:
A. 200 mL/hr
Would take 2.5 hours to infuse—longer than prescribed.
B. 225 mL/hr
Would take about 2.2 hours—slower than prescribed.
D. 275 mL/hr
Would complete the infusion in under 2 hours—faster than ordered, possibly increasing risk of side effects.
. The healthcare provider prescribes one liter of 1/4 strength saline in 5% dextrose solution (D5 1/4 NS) to infuse at a keep-open rate over 24 hours. The IV administration set delivers 15 gtt/mL. The nurse should regulate the infusion pump to deliver how many mL/hr
-
38 mL/hr
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42 mL/hr
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40 mL/hr
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50 mL/hr
Explanation
Correct Answer B: 42 mL/hr
Explanation:
Step 1: Convert liters to milliliters
1 liter = 1,000 mL
Step 2: Divide total volume by time in hours
1,000 mL ÷ 24 hr = 41.67 mL/hr, rounded to the nearest whole number = 42 mL/hr
Note: Since the question asks for how many mL/hr to set on the infusion pump, the drop factor (15 gtt/mL) is not needed here.
Why the Other Options Are Incorrect:
A. 38 mL/hr
Would deliver only 912 mL in 24 hours, which is less than the ordered volume.
C. 40 mL/hr
This is the correct answer and is not incorrect.
D. 50 mL/hr
Would infuse 1,200 mL in 24 hours, exceeding the prescribed 1,000 mL.
A client is receiving a 200 mL bolus of 0.9% sodium chloride to be infused over 20 minutes. The nurse should set the infusion pump to deliver how many mL/hour
-
400 mL/hr
-
500 mL/hr
-
600 mL/hr
-
700 mL/hr
Explanation
Correct Answer C: 600 mL/hr
Explanation:
Step 1: Convert 20 minutes to hours
20 ÷ 60 = 0.33 hours
Step 2: Use the formula:
Volume ÷ Time = Rate (mL/hr)
200 mL ÷ 0.33 hr ≈ 606.06, rounded to the nearest whole number = 600 mL/hr
Why the Other Options Are Incorrect:
A. 400 mL/hr
Would take 30 minutes to infuse—too slow.
B. 500 mL/hr
Would take 24 minutes to infuse—still too slow.
D. 700 mL/hr
Would complete the bolus in about 17 minutes—too fast.
A client receives a prescription for lactated Ringer's 2 liters IV to be infused over 20 hours. How many mL should the nurse program the infusion pump to deliver
-
80 mL/hr
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90 mL/hr
-
100 mL/hr
-
120 mL/hr
Explanation
Correct Answer C: 100 mL/hr
Explanation:
Step 1: Convert liters to milliliters
2 liters = 2,000 mL
Step 2: Divide total volume by total time
2,000 mL ÷ 20 hr = 100 mL/hr
Why the Other Options Are Incorrect:
A. 80 mL/hr
Would deliver only 1,600 mL in 20 hours—less than prescribed.
B. 90 mL/hr
Would deliver 1,800 mL, still under the ordered volume.
D. 120 mL/hr
Would infuse 2,400 mL in 20 hours—more than prescribed, risking fluid overload.
A client is receiving a secondary infusion of vancomycin 1,500 mg in 250 mL to be infused over two hours. The IV administration set delivers 10 gtt/mL. How many gtt/min should the nurse regulate the infusion
-
18 gtt/min
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21 gtt/min
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20 gtt/min
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25 gtt/min
Explanation
Correct Answer B: 21 gtt/min
Explanation:
Use the formula:
(Total volume × Drop factor) ÷ Time in minutes = gtt/min
(250 mL × 10 gtt/mL) ÷ 120 minutes =
2,500 ÷ 120 = 20.83, rounded to the nearest whole number = 21 gtt/min
Why the Other Options Are Incorrect:
A. 18 gtt/min
Delivers only 216 mL in 2 hours—less than prescribed.
C. 20 gtt/min
This is the correct answer and is not incorrect.
D. 25 gtt/min
Would infuse the volume in 100 minutes—faster than the prescribed 2 hours.
A child with a seizure disorder receives a prescription for phenytoin 20 mg by mouth (PO) every 8 hours. The suspension is available in 125 mg/5 mL. How many mL should the nurse administer
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0.6 mL
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0.8 mL
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1.0 mL
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1.2 mL
Explanation
Correct Answer B: 0.8 mL
Explanation:
To find how many mL are needed for a 20 mg dose when the concentration is 125 mg per 5 mL:
Set up the proportion:
125 mg : 5 mL = 20 mg : x mL
x = (20 × 5) ÷ 125 = 100 ÷ 125 = 0.8 mL
Why the Other Options Are Incorrect:
A. 0.6 mL
Delivers only 15 mg—less than the prescribed dose.
C. 1.0 mL
Delivers 25 mg—over the prescribed 20 mg dose.
D. 1.2 mL
Delivers 30 mg—50% higher than ordered, which may cause adverse effects.
A child weighing 44 pounds is experiencing bradycardia and receives a prescription for atropine sulfate 0.01 mg/kg intravenously STAT. The medication is supplied as 0.1 mg/mL. How many mg should the nurse administer
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0.1 mg
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0.2 mg
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0.3 mg
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0.4 mg
Explanation
Correct Answer B: 0.2 mg
Explanation:
Step 1: Convert pounds to kilograms
44 lb ÷ 2.2 = 20 kg
Step 2: Multiply the child’s weight by the prescribed dose
0.01 mg × 20 kg = 0.2 mg
Why the Other Options Are Incorrect:
A. 0.1 mg
This would underdose the child by 50%, delivering medication appropriate for only 10 kg.
C. 0.3 mg
This would overdose the child, as it's the correct dose for a 30 kg child.
D. 0.4 mg
This would deliver double the correct dose and could result in adverse effects.
A 4-year-old is admitted with croup and receives a prescription for a single dose of dexamethasone 0.6 mg/kg IM. The child weighs 35 pounds. How many mg should the nurse administer
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8 mg
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10 mg
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9 mg
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11 mg
Explanation
Correct Answer B: 10 mg
Explanation:
Step 1: Convert weight to kilograms
35 lb ÷ 2.2 = 15.91 kg
Step 2: Multiply by prescribed dose
0.6 mg/kg × 15.91 kg = 9.55 mg
Step 3: Round to the nearest whole number
9.55 mg rounds to 10 mg
Why the Other Options Are Incorrect:
A. 8 mg
Would underdose the child and not meet the required therapeutic level.
C. 10 mg
This is the correct dose based on rounding and is not incorrect.
D. 11 mg
Would exceed the recommended dose based on weight.
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Frequently Asked Question
This prep package offers over 100 exam-style dosage calculation questions closely modeled on the Hesi BSN 215 RN Dosage Calculation exam. The questions cover a wide range of clinical scenarios, including IV infusions, medication dosages based on weight, reconstitution of powders, and infusion rates. Each question is paired with expert explanations that clarify why each answer is correct or incorrect.
There are 55 detailed dosage calculation questions available, with the full package including over 100 questions in total, all designed to sharpen your calculation skills and clinical reasoning.
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You will have unlimited access for 30 days from your purchase date, allowing you to practice, review, and retake questions as often as you like during that time.
Yes. Every question includes detailed explanations for both correct and incorrect answers to help you understand dosage calculation principles clearly and improve accuracy.
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No downloads or installations are required. All questions and explanations are accessible online through your secure ULOSCA account.
Absolutely. The clear explanations and practical questions are designed to help both new and experienced nursing students gain confidence and mastery over dosage calculations.