Ati Dosage Calculation Assessments

ATI DOSAGE CALCULATION ASSESSMENTS
Questions 1 - 200
Advanced / Hard / Mixed Difficulty
Comprehensive Nursing Review Covering Oral, Injectable, IV Infusion,
Pediatric, and Critical Care Dosage Calculations


1. A nurse is preparing to administer cefazolin 500 mg IV. The available vial is
labeled 1 gram/10 mL. How many mL should the nurse administer?
A. 2 mL
B. 3 mL
C. 4 mL
D. 5 mL
Valid answer: D
Explanation: 1 gram = 1000 mg. The concentration is 1000 mg/10 mL = 100
mg/mL. 500 mg / 100 mg/mL = 5 mL. The nurse should administer 5 mL.


2. A nurse is preparing to administer a medication that is available as 500 mg/5
mL. The prescribed dose is 750 mg. How many mL should the nurse administer?
A. 5.0 mL
B. 7.5 mL
C. 10.0 mL
D. 12.5 mL
Valid answer: B
Explanation: The concentration is 500 mg/5 mL = 100 mg/mL. 750 mg / 100
mg/mL = 7.5 mL. The nurse should administer 7.5 mL.


3. A nurse is preparing to administer heparin 5,000 units subcutaneous. The
available vial is labeled 10,000 units/mL. How many mL should the nurse


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,administer?
A. 0.25 mL
B. 0.5 mL
C. 1.0 mL
D. 2.0 mL
Valid answer: B
Explanation: The concentration is 10,000 units/mL. 5,000 units / 10,000
units/mL = 0.5 mL. The nurse should administer 0.5 mL.


4. A nurse is preparing to administer digoxin 0.125 mg PO. The available tablets
are 0.25 mg each. How many tablets should the nurse administer?
A. 0.25 tablets
B. 0.5 tablets
C. 1 tablet
D. 1.5 tablets
Valid answer: B
Explanation: 0.125 mg / 0.25 mg per tablet = 0.5 tablets. The nurse should
administer 0.5 tablets.


5. A nurse is preparing to administer IV fluids at 125 mL/hr. The drop factor is 15
gtt/mL. How many gtt/min should the nurse set the gravity infusion to deliver?
A. 25 gtt/min
B. 31 gtt/min
C. 37 gtt/min
D. 42 gtt/min
Valid answer: B
Explanation: mL/hr × drop factor / 60 min = 125 × = = 31.25
gtt/min. Round to the nearest whole number: 31 gtt/min.




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,6. A nurse is preparing to administer 1,000 mL of 0.9% NaCl over 4 hours. The
drop factor is 10 gtt/mL. How many gtt/min should the nurse set the gravity
infusion to deliver?
A. 33 gtt/min
B. 38 gtt/min
C. 42 gtt/min
D. 50 gtt/min
Valid answer: C
Explanation: 1000 mL / 4 hours = 250 mL/hr. 250 mL/hr × 10 gtt/mL / 60 min =
= 41.66 gtt/min. Round to the nearest whole number: 42 gtt/min.


7. A nurse is preparing to administer vancomycin 1,000 mg IV. The available vial
is labeled 500 mg/100 mL. How many mL should the nurse administer?
A. 100 mL
B. 150 mL
C. 200 mL
D. 250 mL
Valid answer: C
Explanation: The concentration is 500 mg/100 mL. 1,000 mg / 500 mg × 100 mL
= 200 mL. The nurse should administer 200 mL.


8. A nurse is preparing to administer heparin 2,500 units subcutaneous. The
available vial is labeled 5,000 units/mL. How many mL should the nurse
administer?
A. 0.25 mL
B. 0.5 mL
C. 1.0 mL
D. 2.0 mL
Valid answer: B



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, Explanation: The concentration is 5,000 units/mL. 2,500 units / 5,000 units/mL =
0.5 mL. The nurse should administer 0.5 mL.


9. A nurse is preparing to administer a medication that is available as 150 mg/3
mL. The prescribed dose is 250 mg. How many mL should the nurse administer?
A. 2.5 mL
B. 3.0 mL
C. 5.0 mL
D. 7.5 mL
Valid answer: C
Explanation: The concentration is 150 mg/3 mL = 50 mg/mL. 250 mg / 50
mg/mL = 5 mL. The nurse should administer 5.0 mL.


10. A nurse is preparing to administer a medication that is available as 200 mg/5
mL. The prescribed dose is 300 mg. How many mL should the nurse administer?
A. 5.5 mL
B. 7.5 mL
C. 10.0 mL
D. 12.5 mL
Valid answer: B
Explanation: The concentration is 200 mg/5 mL = 40 mg/mL. 300 mg / 40
mg/mL = 7.5 mL. The nurse should administer 7.5 mL.


11. A nurse is preparing to administer IV fluids at 100 mL/hr. The drop factor is
20 gtt/mL. How many gtt/min should the nurse set the gravity infusion to
deliver?
A. 25 gtt/min
B. 30 gtt/min
C. 33 gtt/min


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