DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A provider prescribes acetaminophen 650 mg PO. The
medication available is 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: Set up dimensional analysis
[
650\ \text{mg}\times\frac{1\ \text{tablet}}{325\ \text{mg}}
]
Step 2: Cancel units
mg cancels.
Step 3: Calculate
[
650\div325=2
]
Administer 2 tablets.
,Medication Safety Note: Always verify that the tablet strength
matches the prescribed dose before administering.
Question 2 (Easy)
A prescription reads amoxicillin 500 mg PO. The suspension
available contains 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. 10 mL
Rationale:
Step 1:
[
500\ \text{mg}\times\frac{5\ \text{mL}}{250\ \text{mg}}
]
Step 2:
Cancel mg.
Step 3:
, [
500\times5\div250=10\ \text{mL}
]
Medication Safety Note: Shake oral suspensions well before
measuring the dose.
Question 3 (Easy)
Convert 2.5 g to mg.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C. 2,500 mg
Rationale:
Step 1:
[
2.5\ \text{g}\times\frac{1000\ \text{mg}}{1\ \text{g}}
]
Step 2:
Cancel grams.
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A provider prescribes acetaminophen 650 mg PO. The
medication available is 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: Set up dimensional analysis
[
650\ \text{mg}\times\frac{1\ \text{tablet}}{325\ \text{mg}}
]
Step 2: Cancel units
mg cancels.
Step 3: Calculate
[
650\div325=2
]
Administer 2 tablets.
,Medication Safety Note: Always verify that the tablet strength
matches the prescribed dose before administering.
Question 2 (Easy)
A prescription reads amoxicillin 500 mg PO. The suspension
available contains 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. 10 mL
Rationale:
Step 1:
[
500\ \text{mg}\times\frac{5\ \text{mL}}{250\ \text{mg}}
]
Step 2:
Cancel mg.
Step 3:
, [
500\times5\div250=10\ \text{mL}
]
Medication Safety Note: Shake oral suspensions well before
measuring the dose.
Question 3 (Easy)
Convert 2.5 g to mg.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C. 2,500 mg
Rationale:
Step 1:
[
2.5\ \text{g}\times\frac{1000\ \text{mg}}{1\ \text{g}}
]
Step 2:
Cancel grams.
