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. Tablets
available are 325 mg/tablet. 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: 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 verify tablet strength before administering multiple
tablets.


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

, Step 3
[
500 \times 5 \div 250 = 10\ \text{mL}
]
Medication Safety Note:
Use an oral dosing syringe for accurate liquid measurement.


Question 3 (Easy)
A medication order is for 1.5 g of an antibiotic. The vial label
lists the dose in milligrams.
How many milligrams is 1.5 g?
A. 150 mg
B. 500 mg
C. 1,500 mg
D. 15,000 mg
Correct Answer: C. 1,500 mg
Rationale:
Step 1
[
1.5\ \text{g} \times \frac{1000\ \text{mg}}{1\ \text{g}}
]