1
HESI A2 Medication Safety & Dosage
Calculation Scenarios | Exam Bank with
Math Practice
Table of Contents
Subtopic 1: Dosage Calculation and Safe Limits in Adult Patients...................2
Subtopic 2: Pediatric Medication Safety Calculations....................................19
Subtopic 3: Weight-Based Medication Errors and Unit Conversion Accuracy. 32
Subtopic 4: High-Alert Medications and Double-Check Protocols...................42
Subtopic 5: Timing, Scheduling, and Missed Dose Calculations.....................51
Subtopic 6: IV Compatibility, Dilution, and Administration Math...................60
Subtopic 7: Pediatric Safety, Age-Specific Dosage Adjustments, and Error
Prevention......................................................................................................69
Subtopic 8: High-Alert Medications, Insulin, and Anticoagulant Math in Clinical
Practice..........................................................................................................78
Subtopic 9: IV Compatibility, Labeling, and Safe Administration Protocols....88
Subtopic 10: Post-Administration Monitoring, Error Reporting, and Clinical
Judgment in Medication Safety......................................................................97
, 2
Subtopic 1: Dosage Calculation and Safe
Limits in Adult Patients
Question 1
A physician orders 500 mg of a medication to be given IV every 8 hours. The
available vial contains 250 mg/5 mL. How many mL should the nurse
administer per dose?
A. 10 mL
B. 8 mL
C. 10 mL
D. 5 mL
Answer: C. 10 mL
Rationale:
Use the formula:
(Desired ÷ Available)
×
V
o
l
u
m
e
=
(
500
, 3
250
)
×
5
=
2
×
5
=
10
mL
(Desired ÷ Available)×Volume=(
250
500
)×5=2×5=10 mL
Question 2
A medication has a recommended maximum dosage of 5 mg/kg/day. A
patient weighs 60 kg. What is the maximum daily dose this patient can
receive?
A. 250 mg
B. 300 mg
C. 300 mg
D. 350 mg
Answer: C. 300 mg
Rationale:
, 4
5
mg
×
60
kg
=
300
mg/day
5 mg×60 kg=300 mg/day
Question 3
A nurse needs to administer 1.2 g of an antibiotic. The vial is labeled 400
mg/2 mL. How many mL are required?
A. 5 mL
B. 6 mL
C. 4 mL
D. 3 mL
Answer: B. 6 mL
Rationale:
Convert 1.2 g to mg: 1200 mg.
(
1200
400
)
×
HESI A2 Medication Safety & Dosage
Calculation Scenarios | Exam Bank with
Math Practice
Table of Contents
Subtopic 1: Dosage Calculation and Safe Limits in Adult Patients...................2
Subtopic 2: Pediatric Medication Safety Calculations....................................19
Subtopic 3: Weight-Based Medication Errors and Unit Conversion Accuracy. 32
Subtopic 4: High-Alert Medications and Double-Check Protocols...................42
Subtopic 5: Timing, Scheduling, and Missed Dose Calculations.....................51
Subtopic 6: IV Compatibility, Dilution, and Administration Math...................60
Subtopic 7: Pediatric Safety, Age-Specific Dosage Adjustments, and Error
Prevention......................................................................................................69
Subtopic 8: High-Alert Medications, Insulin, and Anticoagulant Math in Clinical
Practice..........................................................................................................78
Subtopic 9: IV Compatibility, Labeling, and Safe Administration Protocols....88
Subtopic 10: Post-Administration Monitoring, Error Reporting, and Clinical
Judgment in Medication Safety......................................................................97
, 2
Subtopic 1: Dosage Calculation and Safe
Limits in Adult Patients
Question 1
A physician orders 500 mg of a medication to be given IV every 8 hours. The
available vial contains 250 mg/5 mL. How many mL should the nurse
administer per dose?
A. 10 mL
B. 8 mL
C. 10 mL
D. 5 mL
Answer: C. 10 mL
Rationale:
Use the formula:
(Desired ÷ Available)
×
V
o
l
u
m
e
=
(
500
, 3
250
)
×
5
=
2
×
5
=
10
mL
(Desired ÷ Available)×Volume=(
250
500
)×5=2×5=10 mL
Question 2
A medication has a recommended maximum dosage of 5 mg/kg/day. A
patient weighs 60 kg. What is the maximum daily dose this patient can
receive?
A. 250 mg
B. 300 mg
C. 300 mg
D. 350 mg
Answer: C. 300 mg
Rationale:
, 4
5
mg
×
60
kg
=
300
mg/day
5 mg×60 kg=300 mg/day
Question 3
A nurse needs to administer 1.2 g of an antibiotic. The vial is labeled 400
mg/2 mL. How many mL are required?
A. 5 mL
B. 6 mL
C. 4 mL
D. 3 mL
Answer: B. 6 mL
Rationale:
Convert 1.2 g to mg: 1200 mg.
(
1200
400
)
×
