DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A healthcare provider prescribes amoxicillin 500 mg PO. The
pharmacy supplies 250 mg capsules. How many capsules
should the nurse administer?
A. 1 capsule
B. 2 capsules
C. 3 capsules
D. 4 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\ \text{capsules}
]
,Medication Safety Note:
Always verify the strength printed on the medication label
before calculating the number of tablets or capsules.
Question 2 (Easy)
A child is prescribed acetaminophen 240 mg PO. The
suspension available is 160 mg per 5 mL. How many milliliters
should the nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12 mL
Correct Answer: B. 7.5 mL
Rationale:
Step 1:
[
240\ \text{mg}\times\frac{5\ \text{mL}}{160\ \text{mg}}
]
Step 2:
Cancel mg.
Step 3:
, [
240\times5=1200
]
[
1200\div160=7.5\ \text{mL}
]
Medication Safety Note:
Use an oral dosing syringe for accurate measurement of liquid
medications.
Question 3 (Easy)
A prescription reads 0.5 g cefalexin PO. The medication is
supplied as 250 mg tablets. How many tablets should be
administered?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: B. 2 tablets
Rationale:
Step 1: Convert grams to milligrams
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A healthcare provider prescribes amoxicillin 500 mg PO. The
pharmacy supplies 250 mg capsules. How many capsules
should the nurse administer?
A. 1 capsule
B. 2 capsules
C. 3 capsules
D. 4 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\ \text{capsules}
]
,Medication Safety Note:
Always verify the strength printed on the medication label
before calculating the number of tablets or capsules.
Question 2 (Easy)
A child is prescribed acetaminophen 240 mg PO. The
suspension available is 160 mg per 5 mL. How many milliliters
should the nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12 mL
Correct Answer: B. 7.5 mL
Rationale:
Step 1:
[
240\ \text{mg}\times\frac{5\ \text{mL}}{160\ \text{mg}}
]
Step 2:
Cancel mg.
Step 3:
, [
240\times5=1200
]
[
1200\div160=7.5\ \text{mL}
]
Medication Safety Note:
Use an oral dosing syringe for accurate measurement of liquid
medications.
Question 3 (Easy)
A prescription reads 0.5 g cefalexin PO. The medication is
supplied as 250 mg tablets. How many tablets should be
administered?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: B. 2 tablets
Rationale:
Step 1: Convert grams to milligrams
