Solving Problems Using Dimensional

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




TEST BANK

,Question 1 (Easy)
A client is prescribed acetaminophen 650 mg PO. The
medication is available 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
Rationale:
Step 1: Set up dimensional analysis
[
650\ \text{mg} \times \frac{1\ \text{tablet}}{325\ \text{mg}}
]
Step 2: Cancel units
mg cancels, leaving tablets.
Step 3: Solve
[
650 \div 325 = 2
]
Administer 2 tablets.

,Medication Safety Note:
Always compare the prescribed dose with the tablet strength
before administration to avoid underdosing or overdosing.


Question 2 (Easy)
A provider orders amoxicillin 500 mg PO. The suspension
available is 250 mg per 5 mL. How many milliliters should the
nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 15 mL
Correct Answer: C
Rationale:
Step 1: Set up
[
500\ \text{mg} \times \frac{5\ \text{mL}}{250\ \text{mg}}
]
Step 2: Cancel mg
Step 3: Calculate

, [
500 \times 5 \div 250 = 10\ \text{mL}
]
Medication Safety Note:
Shake oral suspensions thoroughly before measuring the dose.


Question 3 (Easy)
The provider prescribes 1 g cefazolin IV. The vial contains 500
mg per vial after reconstitution. How many vials are needed?
A. 1
B. 1.5
C. 2
D. 3
Correct Answer: C
Rationale:
Step 1
Convert grams to milligrams.
[
1\ \text{g}=1000\ \text{mg}
]
Step 2