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 nurse receives an order for amoxicillin 750 mg PO. The
medication available is amoxicillin 250 mg capsules. How many
capsules should the nurse administer?
A. 2 capsules
B. 2.5 capsules
C. 3 capsules
D. 4 capsules
Correct Answer: C. 3 capsules
Rationale:
Step 1: Set up dimensional analysis:
[
750\ \text{mg} \times \frac{1\ \text{capsule}}{250\ \text{mg}}
]
Step 2: Cancel units:
[
\frac{750}{250}=3\ \text{capsules}
]
Step 3: Administer 3 capsules.
Medication Safety Note: Always verify that the dosage strength
on the medication label matches the prescribed dose before
administration.

,Question 2 (Easy)
A provider prescribes 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. 2 tablets
Rationale:
Step 1:
[
650\ \text{mg} \times \frac{1\ \text{tablet}}{325\ \text{mg}}
]
Step 2:
[
\frac{650}{325}=2
]
Step 3: Administer 2 tablets.

, Medication Safety Note: Double-check calculations when
multiple tablets are required to avoid underdosing or
overdosing.


Question 3 (Easy)
A nurse needs to administer 30 mL of liquid medication. How
many tablespoons should the nurse provide?
A. 1 tbsp
B. 2 tbsp
C. 3 tbsp
D. 4 tbsp
Correct Answer: B. 2 tbsp
Rationale:
Step 1: Use the conversion:
[
1\ \text{tbsp}=15\ \text{mL}
]
Step 2:
[
30\ \text{mL} \times \frac{1\ \text{tbsp}}{15\ \text{mL}}=2\
\text{tbsp}
]