Solving Problems Using Dimensional

DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG




TEST BANK

,Question 1 — Dimensional Analysis Fundamentals (Easy)
A healthcare provider prescribes amoxicillin 500 mg orally. The
medication available is 250 mg per capsule.
How many capsules should the nurse administer?
A. 1 capsule
B. 2 capsules
C. 2.5 capsules
D. 3 capsules
Correct Answer: B. 2 capsules
Rationale
Step 1: Set up dimensional analysis
[
500\ \text{mg} \times \frac{1\ \text{capsule}}{250\ \text{mg}}
]
Step 2: Cancel units
mg cancels, leaving capsules.
Step 3: Calculate
[
500 \div 250 = 2
]
Administer 2 capsules.

,Medication Safety Note
Verify the prescribed dose and ensure the patient can safely
swallow multiple capsules before administration.


Question 2 — Oral Dosage Calculations (Easy)
A provider prescribes acetaminophen 650 mg orally. The
medication is supplied as 325-mg tablets.
How many tablets should the nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
Correct Answer: C. 2 tablets
Rationale
Step 1
[
650\ \text{mg} \times \frac{1\ \text{tablet}}{325\ \text{mg}}
]
Step 2
Cancel mg.

, Step 3
[
650 \div 325 = 2
]
Administer 2 tablets.
Medication Safety Note
Confirm that the total dose does not exceed the recommended
daily maximum.


Question 3 — Injectable Medications (Easy)
A patient is prescribed cefazolin 750 mg IM.
The vial contains 1 g in 4 mL after reconstitution.
How many milliliters should the nurse administer?
A. 2 mL
B. 3 mL
C. 4 mL
D. 5 mL
Correct Answer: B. 3 mL
Rationale
Step 1