Dosage Calculations & RN ATI Adult Medical-Surgical
Proctored Assessment 3 (EN) – 175 Questions with
Detailed Answers (Graded A) 2026/2027
1. A health care provider orders 250 mg of an antibiotic suspension. The label on
the suspension reads "500 mg/5 mL." How much would the nurse administer?
A. 1.5 mL
B. 2 mL
C. 2.5 mL
D. 3 mL
Correct Answer: C
Rationale: Use ratio and proportion: 500 mg/5 mL = 250 mg/x mL. Cross multiply: 500x
= 1250. Divide by 500: x = 2.5 mL.
2. The client is to be given ascorbic acid 1 g daily by mouth. The medication comes
in a container labeled, "Ascorbic Acid 250 mg tablets." How much will the nurse
give?
A. 2 tablets
B. 3 tablets
C. 4 tablets
D. 5 tablets
Correct Answer: C
Rationale: Convert 1 g to mg: 1 g = 1000 mg. 1000 mg ÷ 250 mg/tablet = 4 tablets.
3. The PCP orders amoxicillin 250 mg by mouth two times a day. The drug label
reads "Amoxicillin 125 mg/5 ml." How much will the nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
Correct Answer: C
Rationale: 125 mg/5 mL = 250 mg/x mL. Cross multiply: 125x = 1250. x = 10 mL.
,4. A nurse is to administer 175 mg of a medication intramuscularly. The label on
the multidose vial states that the concentration is 100 mg/mL. What volume
should the nurse administer?
A. 1.5 mL
B. 1.7 mL
C. 1.75 mL
D. 2 mL
Correct Answer: B
Rationale: 100 mg/1 mL = 175 mg/x mL. 100x = 175. x = 1.75 mL, rounded to 1.7 mL.
5. The nurse is preparing to administer 80 mg of Solu-medrol IV to a client with
pneumonia. The vial states that it has 120 mg per 2 mL. How much should the
nurse draw up?
A. 1.3 mL
B. 1.5 mL
C. 1.7 mL
D. 2 mL
Correct Answer: A
Rationale: 120 mg/2 mL = 80 mg/x mL. 120x = 160. x = 1.33 mL, rounded to 1.3 mL.
6. The health care provider prescribes ascorbic acid 0.5 g daily. The drug label
reads ascorbic acid 250 mg. How many tablets should the nurse administer?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: B
Rationale: 0.5 g = 500 mg. 500 mg ÷ 250 mg/tablet = 2 tablets.
7. A client is being treated for congestive heart failure and is to receive 0.5
milligrams of digoxin, which is available in 250-microgram tablets. How many
tablets should the nurse administer?
,A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: B
Rationale: Convert 0.5 mg to mcg: 0.5 mg = 500 mcg. 500 mcg ÷ 250 mcg/tablet = 2
tablets.
8. The nurse is to administer 25 mg of meperidine. The vial states that it contains
meperidine 50 mg/1 mL. How much medication should the nurse draw up?
A. 0.25 mL
B. 0.5 mL
C. 0.75 mL
D. 1 mL
Correct Answer: B
Rationale: 50 mg/1 mL = 25 mg/x mL. 50x = 25. x = 0.5 mL.
9. A nurse needs to convert 3 fluid ounces to the metric system equivalent. What is
the result?
A. 60 mL
B. 75 mL
C. 90 mL
D. 120 mL
Correct Answer: C
Rationale: 1 fluid ounce = 30 mL. 3 fl oz × 30 mL/fl oz = 90 mL.
10. A patient has an order for Chloromycetin, 500 mg every 6 hours. The drug
comes in 250 mg capsules. What would the nurse administer?
A. 1 capsule
B. 2 capsules
C. 3 capsules
D. 4 capsules
, Correct Answer: B
Rationale: 500 mg ÷ 250 mg/capsule = 2 capsules.
11. A nurse is to administer 150 mg of a drug intramuscularly. The label on the
multidose vials reads 100 mg/mL. How much would the nurse give?
A. 1 mL
B. 1.5 mL
C. 2 mL
D. 2.5 mL
Correct Answer: B
Rationale: 100 mg/1 mL = 150 mg/x mL. 100x = 150. x = 1.5 mL.
12. A nurse is to administer 30 mg of furosemide to a client with CHF. The vial
contains 40 mg/mL. What is the correct dose to administer?
A. 0.5 mL
B. 0.75 mL
C. 1 mL
D. 1.25 mL
Correct Answer: B
Rationale: 40 mg/1 mL = 30 mg/x mL. 40x = 30. x = 0.75 mL.
13. A child is to receive 500 mg of an antibiotic suspension. The label reads 250
mg/5 mL. How much should the nurse administer in one dose?
A. 5 mL
B. 8 mL
C. 10 mL
D. 12 mL
Correct Answer: C
Rationale: 250 mg/5 mL = 500 mg/x mL. 250x = 2500. x = 10 mL.
14. A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension.
How many tsp is this equivalent to?
A. 1 tsp
B. 1.5 tsp
Proctored Assessment 3 (EN) – 175 Questions with
Detailed Answers (Graded A) 2026/2027
1. A health care provider orders 250 mg of an antibiotic suspension. The label on
the suspension reads "500 mg/5 mL." How much would the nurse administer?
A. 1.5 mL
B. 2 mL
C. 2.5 mL
D. 3 mL
Correct Answer: C
Rationale: Use ratio and proportion: 500 mg/5 mL = 250 mg/x mL. Cross multiply: 500x
= 1250. Divide by 500: x = 2.5 mL.
2. The client is to be given ascorbic acid 1 g daily by mouth. The medication comes
in a container labeled, "Ascorbic Acid 250 mg tablets." How much will the nurse
give?
A. 2 tablets
B. 3 tablets
C. 4 tablets
D. 5 tablets
Correct Answer: C
Rationale: Convert 1 g to mg: 1 g = 1000 mg. 1000 mg ÷ 250 mg/tablet = 4 tablets.
3. The PCP orders amoxicillin 250 mg by mouth two times a day. The drug label
reads "Amoxicillin 125 mg/5 ml." How much will the nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
Correct Answer: C
Rationale: 125 mg/5 mL = 250 mg/x mL. Cross multiply: 125x = 1250. x = 10 mL.
,4. A nurse is to administer 175 mg of a medication intramuscularly. The label on
the multidose vial states that the concentration is 100 mg/mL. What volume
should the nurse administer?
A. 1.5 mL
B. 1.7 mL
C. 1.75 mL
D. 2 mL
Correct Answer: B
Rationale: 100 mg/1 mL = 175 mg/x mL. 100x = 175. x = 1.75 mL, rounded to 1.7 mL.
5. The nurse is preparing to administer 80 mg of Solu-medrol IV to a client with
pneumonia. The vial states that it has 120 mg per 2 mL. How much should the
nurse draw up?
A. 1.3 mL
B. 1.5 mL
C. 1.7 mL
D. 2 mL
Correct Answer: A
Rationale: 120 mg/2 mL = 80 mg/x mL. 120x = 160. x = 1.33 mL, rounded to 1.3 mL.
6. The health care provider prescribes ascorbic acid 0.5 g daily. The drug label
reads ascorbic acid 250 mg. How many tablets should the nurse administer?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: B
Rationale: 0.5 g = 500 mg. 500 mg ÷ 250 mg/tablet = 2 tablets.
7. A client is being treated for congestive heart failure and is to receive 0.5
milligrams of digoxin, which is available in 250-microgram tablets. How many
tablets should the nurse administer?
,A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: B
Rationale: Convert 0.5 mg to mcg: 0.5 mg = 500 mcg. 500 mcg ÷ 250 mcg/tablet = 2
tablets.
8. The nurse is to administer 25 mg of meperidine. The vial states that it contains
meperidine 50 mg/1 mL. How much medication should the nurse draw up?
A. 0.25 mL
B. 0.5 mL
C. 0.75 mL
D. 1 mL
Correct Answer: B
Rationale: 50 mg/1 mL = 25 mg/x mL. 50x = 25. x = 0.5 mL.
9. A nurse needs to convert 3 fluid ounces to the metric system equivalent. What is
the result?
A. 60 mL
B. 75 mL
C. 90 mL
D. 120 mL
Correct Answer: C
Rationale: 1 fluid ounce = 30 mL. 3 fl oz × 30 mL/fl oz = 90 mL.
10. A patient has an order for Chloromycetin, 500 mg every 6 hours. The drug
comes in 250 mg capsules. What would the nurse administer?
A. 1 capsule
B. 2 capsules
C. 3 capsules
D. 4 capsules
, Correct Answer: B
Rationale: 500 mg ÷ 250 mg/capsule = 2 capsules.
11. A nurse is to administer 150 mg of a drug intramuscularly. The label on the
multidose vials reads 100 mg/mL. How much would the nurse give?
A. 1 mL
B. 1.5 mL
C. 2 mL
D. 2.5 mL
Correct Answer: B
Rationale: 100 mg/1 mL = 150 mg/x mL. 100x = 150. x = 1.5 mL.
12. A nurse is to administer 30 mg of furosemide to a client with CHF. The vial
contains 40 mg/mL. What is the correct dose to administer?
A. 0.5 mL
B. 0.75 mL
C. 1 mL
D. 1.25 mL
Correct Answer: B
Rationale: 40 mg/1 mL = 30 mg/x mL. 40x = 30. x = 0.75 mL.
13. A child is to receive 500 mg of an antibiotic suspension. The label reads 250
mg/5 mL. How much should the nurse administer in one dose?
A. 5 mL
B. 8 mL
C. 10 mL
D. 12 mL
Correct Answer: C
Rationale: 250 mg/5 mL = 500 mg/x mL. 250x = 2500. x = 10 mL.
14. A nurse is preparing to administer 7.5 mL of ampicillin 250 mg oral suspension.
How many tsp is this equivalent to?
A. 1 tsp
B. 1.5 tsp
