DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A provider orders acetaminophen 650 mg PO. The medication
available is acetaminophen 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 mg×1 tablet325 mg650 \text{ mg} \times \frac{1 \text{
tablet}}{325 \text{ mg}}650 mg×325 mg1 tablet
Step 2: Cancel mg.
650÷325=2650 \div 325 = 2650÷325=2
Step 3: Solution.
2 tablets2 \text{ tablets}2 tablets
Medication Safety Note: Verify the tablet strength before
administration to avoid underdosing or overdosing.
Question 2 (Easy)
,A patient is prescribed amoxicillin 500 mg PO. The pharmacy
supplies amoxicillin suspension 250 mg/5 mL.
How many mL should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Correct Answer: B. 10 mL
Rationale:
Step 1: Set up dimensional analysis.
500 mg×5 mL250 mg500 \text{ mg} \times \frac{5 \text{
mL}}{250 \text{ mg}}500 mg×250 mg5 mL
Step 2: Cancel mg.
500×5÷250=10500 \times 5 \div 250 = 10500×5÷250=10
Step 3: Solution.
10 mL10 \text{ mL}10 mL
Medication Safety Note: Use an oral dosing syringe for accurate
measurement.
Question 3 (Easy)
Convert 1.5 g to mg.
, A. 15 mg
B. 150 mg
C. 1,500 mg
D. 15,000 mg
Correct Answer: C. 1,500 mg
Rationale:
Step 1: Conversion factor.
1 g=1000 mg1 \text{ g} = 1000 \text{ mg}1 g=1000 mg
Step 2: Dimensional analysis.
1.5 g×1000 mg1 g1.5 \text{ g} \times \frac{1000 \text{ mg}}{1
\text{ g}}1.5 g×1 g1000 mg
Step 3: Solution.
1500 mg1500 \text{ mg}1500 mg
Medication Safety Note: Errors in gram-to-milligram conversion
are a common cause of medication errors.
Question 4 (Easy)
A patient is ordered furosemide 40 mg PO. Available tablets
contain 20 mg each.
How many tablets should be administered?
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy)
A provider orders acetaminophen 650 mg PO. The medication
available is acetaminophen 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 mg×1 tablet325 mg650 \text{ mg} \times \frac{1 \text{
tablet}}{325 \text{ mg}}650 mg×325 mg1 tablet
Step 2: Cancel mg.
650÷325=2650 \div 325 = 2650÷325=2
Step 3: Solution.
2 tablets2 \text{ tablets}2 tablets
Medication Safety Note: Verify the tablet strength before
administration to avoid underdosing or overdosing.
Question 2 (Easy)
,A patient is prescribed amoxicillin 500 mg PO. The pharmacy
supplies amoxicillin suspension 250 mg/5 mL.
How many mL should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Correct Answer: B. 10 mL
Rationale:
Step 1: Set up dimensional analysis.
500 mg×5 mL250 mg500 \text{ mg} \times \frac{5 \text{
mL}}{250 \text{ mg}}500 mg×250 mg5 mL
Step 2: Cancel mg.
500×5÷250=10500 \times 5 \div 250 = 10500×5÷250=10
Step 3: Solution.
10 mL10 \text{ mL}10 mL
Medication Safety Note: Use an oral dosing syringe for accurate
measurement.
Question 3 (Easy)
Convert 1.5 g to mg.
, A. 15 mg
B. 150 mg
C. 1,500 mg
D. 15,000 mg
Correct Answer: C. 1,500 mg
Rationale:
Step 1: Conversion factor.
1 g=1000 mg1 \text{ g} = 1000 \text{ mg}1 g=1000 mg
Step 2: Dimensional analysis.
1.5 g×1000 mg1 g1.5 \text{ g} \times \frac{1000 \text{ mg}}{1
\text{ g}}1.5 g×1 g1000 mg
Step 3: Solution.
1500 mg1500 \text{ mg}1500 mg
Medication Safety Note: Errors in gram-to-milligram conversion
are a common cause of medication errors.
Question 4 (Easy)
A patient is ordered furosemide 40 mg PO. Available tablets
contain 20 mg each.
How many tablets should be administered?
