HESI 215 Dosage Calculation Exam V2
2026/2027 - Medication Safety & Conversions Review
Comprehensive Review Examination - Version 2
Instructions: Select the single best answer for each question. Verify all calculations using dimensional analysis or the formula method.
Bolded answer choices indicate the correct response.
1. The physician orders 0.25 g of a medication. The pharmacy dispenses tablets labeled 125 mg per tablet. How
many tablets should the nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 2 tablets [CORRECT]
D. 2.5 tablets
Correct Answer: C
Rationale: Correct because 0.25 g equals 250 mg; dividing 250 mg by 125 mg per tablet gives 2 tablets. This
matches the metric conversion of grams to milligrams and the Desired/Have formula method.
2. Which of the following is one of the Six Rights of Medication Administration?
A. Right time of day
B. Right cost
C. Right route [CORRECT]
D. Right room
Correct Answer: C
Rationale: This matches the Six Rights: right patient, right drug, right dose, right route, right time, and right
documentation. The right route ensures the medication is delivered via the prescribed method such as oral,
IV, or IM.
3. A patient is prescribed 7.5 units of regular insulin subcutaneously. The insulin vial is labeled 100 units/mL. How
many milliliters should the nurse draw up in the syringe?
A. 0.075 mL
B. 0.75 mL
C. 0.075 mL
D. 7.5 mL
Correct Answer: A
Rationale: Correct because using the formula method: 7.5 units divided by 100 units/mL equals 0.075 mL.
This matches standard U-100 insulin concentration calculations and requires the use of an insulin syringe for
accurate measurement.
, 4. The physician orders 1000 mL of IV fluid to infuse over 8 hours. The IV tubing has a drop factor of 15 gtt/mL.
What is the flow rate in gtt/min?
A. 21 gtt/min
B. 31 gtt/min
C. 63 gtt/min
D. 125 gtt/min
Correct Answer: B
Rationale: Correct because 1000 mL divided by 8 hours equals 125 mL/hr; multiplying by 15 gtt/mL and
dividing by 60 min gives 31.25, which rounds to 31 gtt/min. This matches the standard IV flow rate formula
using drop factor.
5. A child weighing 22 lb is ordered to receive amoxicillin 40 mg/kg/day divided every 8 hours. What is the total
daily dose in milligrams?
A. 200 mg
B. 400 mg
C. 800 mg
D. 1200 mg
Correct Answer: B
Rationale: Correct because 22 lb divided by 2.2 equals 10 kg; multiplying 10 kg by 40 mg/kg gives 400 mg per
day. This matches the weight-based pediatric dosing formula and confirms the importance of converting
pounds to kilograms first.
6. Which pair of medications is considered a Look-Alike Sound-Alike (LASA) high-alert combination?
A. Acetaminophen and Ibuprofen
B. Heparin and Enoxaparin
C. Hydroxyzine and Hydralazine [CORRECT]
D. Metformin and Metronidazole
Correct Answer: C
Rationale: This matches the ISMP list of LASA medications; hydroxyzine (an antihistamine) and hydralazine
(an antihypertensive) are easily confused due to similar spelling and pronunciation, requiring tall-man
lettering and independent double checks.
7. The physician orders 250 mg of a liquid medication. The bottle is labeled 100 mg/5 mL. How many milliliters
should the nurse administer?
A. 5 mL
B. 10 mL
C. 12.5 mL [CORRECT]
D. 25 mL
Correct Answer: C
Rationale: Correct because using the formula: desired 250 mg divided by available 100 mg multiplied by 5 mL
equals 12.5 mL. This matches the standard liquid medication calculation using the Desired/Have × Volume
method.
2026/2027 - Medication Safety & Conversions Review
Comprehensive Review Examination - Version 2
Instructions: Select the single best answer for each question. Verify all calculations using dimensional analysis or the formula method.
Bolded answer choices indicate the correct response.
1. The physician orders 0.25 g of a medication. The pharmacy dispenses tablets labeled 125 mg per tablet. How
many tablets should the nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 2 tablets [CORRECT]
D. 2.5 tablets
Correct Answer: C
Rationale: Correct because 0.25 g equals 250 mg; dividing 250 mg by 125 mg per tablet gives 2 tablets. This
matches the metric conversion of grams to milligrams and the Desired/Have formula method.
2. Which of the following is one of the Six Rights of Medication Administration?
A. Right time of day
B. Right cost
C. Right route [CORRECT]
D. Right room
Correct Answer: C
Rationale: This matches the Six Rights: right patient, right drug, right dose, right route, right time, and right
documentation. The right route ensures the medication is delivered via the prescribed method such as oral,
IV, or IM.
3. A patient is prescribed 7.5 units of regular insulin subcutaneously. The insulin vial is labeled 100 units/mL. How
many milliliters should the nurse draw up in the syringe?
A. 0.075 mL
B. 0.75 mL
C. 0.075 mL
D. 7.5 mL
Correct Answer: A
Rationale: Correct because using the formula method: 7.5 units divided by 100 units/mL equals 0.075 mL.
This matches standard U-100 insulin concentration calculations and requires the use of an insulin syringe for
accurate measurement.
, 4. The physician orders 1000 mL of IV fluid to infuse over 8 hours. The IV tubing has a drop factor of 15 gtt/mL.
What is the flow rate in gtt/min?
A. 21 gtt/min
B. 31 gtt/min
C. 63 gtt/min
D. 125 gtt/min
Correct Answer: B
Rationale: Correct because 1000 mL divided by 8 hours equals 125 mL/hr; multiplying by 15 gtt/mL and
dividing by 60 min gives 31.25, which rounds to 31 gtt/min. This matches the standard IV flow rate formula
using drop factor.
5. A child weighing 22 lb is ordered to receive amoxicillin 40 mg/kg/day divided every 8 hours. What is the total
daily dose in milligrams?
A. 200 mg
B. 400 mg
C. 800 mg
D. 1200 mg
Correct Answer: B
Rationale: Correct because 22 lb divided by 2.2 equals 10 kg; multiplying 10 kg by 40 mg/kg gives 400 mg per
day. This matches the weight-based pediatric dosing formula and confirms the importance of converting
pounds to kilograms first.
6. Which pair of medications is considered a Look-Alike Sound-Alike (LASA) high-alert combination?
A. Acetaminophen and Ibuprofen
B. Heparin and Enoxaparin
C. Hydroxyzine and Hydralazine [CORRECT]
D. Metformin and Metronidazole
Correct Answer: C
Rationale: This matches the ISMP list of LASA medications; hydroxyzine (an antihistamine) and hydralazine
(an antihypertensive) are easily confused due to similar spelling and pronunciation, requiring tall-man
lettering and independent double checks.
7. The physician orders 250 mg of a liquid medication. The bottle is labeled 100 mg/5 mL. How many milliliters
should the nurse administer?
A. 5 mL
B. 10 mL
C. 12.5 mL [CORRECT]
D. 25 mL
Correct Answer: C
Rationale: Correct because using the formula: desired 250 mg divided by available 100 mg multiplied by 5 mL
equals 12.5 mL. This matches the standard liquid medication calculation using the Desired/Have × Volume
method.
