D441 NURS 2001
Medical Dosage Calculations &
Pharmacology
OA READINESS EXAM GUIDE
Q&S
©2024/2025
,1. A patient is prescribed 2 mg of Morphine IV every 4
hours for pain. If the medication is supplied in a
concentration of 4 mg/mL, how many mL should the nurse
administer per dose?
A. 0.25 mL
B. 0.5 mL
C. 1 mL
D. 2 mL
Answer: B. 0.5 mL
Rationale: \[2 \text{ mg} \div 4 \text{ mg/mL} = 0.5 \text{
mL}\]
2. A patient weighs 70 kg and is to receive a medication
dosed at 5 mg/kg/day, administered in two divided doses.
What is the dose per administration?
A. 175 mg
B. 87.5 mg
C. 350 mg
D. 70 mg
Answer: A. 175 mg
Rationale: \(70 \text{ kg} \times 5 \text{ mg/kg/day} =
350 \text{ mg/day}\) and \(\frac{350 \text{ mg}}{2} = 175
\text{ mg}\)
3. A medication is ordered to be given at 1.5 mg/kg. The
patient's weight is 80 pounds. How many mg should be
administered? (1 kg = 2.2 pounds)
A. 54.5 mg
©2024/2025
, B. 60 mg
C. 72 mg
D. 108 mg
Answer: B. 54.5 mg
Rationale: \(80 \text{ pounds} \div 2.2 = 36.36 \text{
kg}\), then \(36.36 \text{ kg} \times 1.5 \text{ mg/kg} = 54.5
\text{ mg}\)
4. A pediatric patient requires an antibiotic dosed at 25
mg/kg/day divided into 4 doses. The child weighs 22 kg.
What is the dose per administration?
A. 137.5 mg
B. 110 mg
C. 137 mg
D. 125 mg
Answer: D. 137.5 mg
Rationale: \(22 \text{ kg} \times 25 \text{ mg/kg/day} =
550 \text{ mg/day}\), then \(\frac{550 \text{ mg}}{4} ≈ 137.5
\text{ mg}\)
5. A patient is prescribed 500 mL of an IV solution to run
over 8 hours. The drop factor is 20 drops/mL. What is the
flow rate in drops per minute?
A. 41.7 drops/min
B. 20.8 drops/min
C. 62.5 drops/min
D. 24.2 drops/min
Answer: A. 20.8 drops/min
©2024/2025
Medical Dosage Calculations &
Pharmacology
OA READINESS EXAM GUIDE
Q&S
©2024/2025
,1. A patient is prescribed 2 mg of Morphine IV every 4
hours for pain. If the medication is supplied in a
concentration of 4 mg/mL, how many mL should the nurse
administer per dose?
A. 0.25 mL
B. 0.5 mL
C. 1 mL
D. 2 mL
Answer: B. 0.5 mL
Rationale: \[2 \text{ mg} \div 4 \text{ mg/mL} = 0.5 \text{
mL}\]
2. A patient weighs 70 kg and is to receive a medication
dosed at 5 mg/kg/day, administered in two divided doses.
What is the dose per administration?
A. 175 mg
B. 87.5 mg
C. 350 mg
D. 70 mg
Answer: A. 175 mg
Rationale: \(70 \text{ kg} \times 5 \text{ mg/kg/day} =
350 \text{ mg/day}\) and \(\frac{350 \text{ mg}}{2} = 175
\text{ mg}\)
3. A medication is ordered to be given at 1.5 mg/kg. The
patient's weight is 80 pounds. How many mg should be
administered? (1 kg = 2.2 pounds)
A. 54.5 mg
©2024/2025
, B. 60 mg
C. 72 mg
D. 108 mg
Answer: B. 54.5 mg
Rationale: \(80 \text{ pounds} \div 2.2 = 36.36 \text{
kg}\), then \(36.36 \text{ kg} \times 1.5 \text{ mg/kg} = 54.5
\text{ mg}\)
4. A pediatric patient requires an antibiotic dosed at 25
mg/kg/day divided into 4 doses. The child weighs 22 kg.
What is the dose per administration?
A. 137.5 mg
B. 110 mg
C. 137 mg
D. 125 mg
Answer: D. 137.5 mg
Rationale: \(22 \text{ kg} \times 25 \text{ mg/kg/day} =
550 \text{ mg/day}\), then \(\frac{550 \text{ mg}}{4} ≈ 137.5
\text{ mg}\)
5. A patient is prescribed 500 mL of an IV solution to run
over 8 hours. The drop factor is 20 drops/mL. What is the
flow rate in drops per minute?
A. 41.7 drops/min
B. 20.8 drops/min
C. 62.5 drops/min
D. 24.2 drops/min
Answer: A. 20.8 drops/min
©2024/2025
