DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A 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
Rationale:
Step 1:
Desired = 500 mg
Step 2 (Dimensional Analysis):
[
500\ \text{mg}\times\frac{1\ \text{capsule}}{250\ \text{mg}}=2\
\text{capsules}
]
Step 3:
Administer 2 capsules.
Medication Safety Note:
Always verify tablet/capsule strength before administration.
,Question 2 (Easy)
A child is prescribed 240 mg acetaminophen. The liquid
contains 160 mg/5 mL. How many milliliters should the nurse
administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
Correct Answer: B
Rationale:
Step 1: Desired dose = 240 mg
Step 2:
[
240\ \text{mg}\times\frac{5\ \text{mL}}{160\ \text{mg}}=7.5\
\text{mL}
]
Step 3: Administer 7.5 mL.
Medication Safety Note:
Use an oral syringe for accurate measurement.
, Question 3 (Easy)
Convert 2.5 g to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C
Rationale:
Step 1:
[
1\ \text{g}=1000\ \text{mg}
]
Step 2:
[
2.5\ \text{g}\times\frac{1000\ \text{mg}}{1\ \text{g}}=2500\
\text{mg}
]
Step 3:
2.5 g = 2,500 mg.
Medication Safety Note:
Incorrect conversions can result in tenfold dosing errors.
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A 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
Rationale:
Step 1:
Desired = 500 mg
Step 2 (Dimensional Analysis):
[
500\ \text{mg}\times\frac{1\ \text{capsule}}{250\ \text{mg}}=2\
\text{capsules}
]
Step 3:
Administer 2 capsules.
Medication Safety Note:
Always verify tablet/capsule strength before administration.
,Question 2 (Easy)
A child is prescribed 240 mg acetaminophen. The liquid
contains 160 mg/5 mL. How many milliliters should the nurse
administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
Correct Answer: B
Rationale:
Step 1: Desired dose = 240 mg
Step 2:
[
240\ \text{mg}\times\frac{5\ \text{mL}}{160\ \text{mg}}=7.5\
\text{mL}
]
Step 3: Administer 7.5 mL.
Medication Safety Note:
Use an oral syringe for accurate measurement.
, Question 3 (Easy)
Convert 2.5 g to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C
Rationale:
Step 1:
[
1\ \text{g}=1000\ \text{mg}
]
Step 2:
[
2.5\ \text{g}\times\frac{1000\ \text{mg}}{1\ \text{g}}=2500\
\text{mg}
]
Step 3:
2.5 g = 2,500 mg.
Medication Safety Note:
Incorrect conversions can result in tenfold dosing errors.
