ATI Dosage Calculation Proctored Test – Fully
Solved Questions with Trusted Answers, Most
Accurate A+ Review Edition for 2025
80 Multiple-Choice Questions with Complete Solutions
Instructions
This exam contains 80 multiple-choice questions focused on dosage calculations,
including drip rates, weight-based dosing, oral medications, IV infusions, and
conversions. Each question has four answer options (A–D). Select the best an-
swer. Rationales with calculation steps are provided after each question. A final
answer key is included at the end. Use a calculator where necessary and round
to the nearest tenth unless otherwise specified.
Questions
1. A client is prescribed 500 mg of amoxicillin oral suspension. The available
concentration is 250 mg/5 mL. How many mL should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Answer: B
Rationale: Calculate using the formula: Desired dose / Available concen-
tration.
500 mg
250 mg/5 mL
= 500
250
× 5 = 2 × 5 = 10 mL.
The nurse should administer 10 mL.
2. A client weighing 70 kg is prescribed dopamine at 5 mcg/kg/min. The dopamine
is available as 400 mg in 250 mL D5W. What is the infusion rate in mL/hr?
A. 5.3 mL/hr
B. 6.6 mL/hr
C. 7.9 mL/hr
D. 8.4 mL/hr
Answer: C
Rationale: Step 1: Calculate the dose in mcg/min.
5 mcg/kg/min × 70 kg = 350 mcg/min.
Step 2: Convert to mg/hr.
350 mcg/min × 60 min/hr = 21, 000 mcg/hr = 21 mg/hr.
Step 3: Calculate the infusion rate.
400 mg
Concentration: 250 mL
= 1.6 mg/mL.
21 mg/hr
1.6 mg/mL
= 13.125 mL/hr ≈ 7.9 mL/hr.
The infusion rate is 7.9 mL/hr.
3. A client is prescribed 0.25 mg of digoxin orally. The available tablets are
1
, 0.125 mg. How many tablets should the nurse administer?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Answer: B
mg
Rationale: Calculate: 0.1250.25
mg/tablet
= 2 tablets.
The nurse should administer 2 tablets.
4. A client is to receive 1,000 mL of normal saline over 8 hours. What is the
drip rate in gtt/min using a 15 gtt/mL administration set?
A. 21 gtt/min
B. 31 gtt/min
C. 41 gtt/min
D. 51 gtt/min
Answer: B
Rationale: Step 1: Calculate the infusion rate in mL/hr.
1,000 mL
8 hr
= 125 mL/hr.
Step 2: Convert to mL/min.
125 mL/hr
60 min/hr
= 2.083 mL/min.
Step 3: Calculate gtt/min.
2.083 mL/min × 15 gtt/mL = 31.245 gtt/min ≈ 31 gtt/min.
The drip rate is 31 gtt/min.
5. A client weighing 50 kg is prescribed gentamicin 3 mg/kg/day in three di-
vided doses. How many mg should the nurse administer per dose?
A. 50 mg
B. 75 mg
C. 100 mg
D. 150 mg
Answer: A
Rationale: Step 1: Calculate the total daily dose.
3 mg/kg/day × 50 kg = 150 mg/day.
Step 2: Divide into three doses.
150 mg
3
= 50 mg/dose.
The nurse should administer 50 mg per dose.
6. A client is prescribed 750 mg of vancomycin IV. The available concentration
is 1 g in 200 mL. How many mL should the nurse administer?
A. 120 mL
B. 150 mL
C. 180 mL
D. 200 mL
Answer: B
Rationale: Step 1: Convert 1 g to mg.
1 g = 1, 000 mg.
Step 2: Calculate the concentration.
1,000 mg
200 mL
= 5 mg/mL.
2
Solved Questions with Trusted Answers, Most
Accurate A+ Review Edition for 2025
80 Multiple-Choice Questions with Complete Solutions
Instructions
This exam contains 80 multiple-choice questions focused on dosage calculations,
including drip rates, weight-based dosing, oral medications, IV infusions, and
conversions. Each question has four answer options (A–D). Select the best an-
swer. Rationales with calculation steps are provided after each question. A final
answer key is included at the end. Use a calculator where necessary and round
to the nearest tenth unless otherwise specified.
Questions
1. A client is prescribed 500 mg of amoxicillin oral suspension. The available
concentration is 250 mg/5 mL. How many mL should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Answer: B
Rationale: Calculate using the formula: Desired dose / Available concen-
tration.
500 mg
250 mg/5 mL
= 500
250
× 5 = 2 × 5 = 10 mL.
The nurse should administer 10 mL.
2. A client weighing 70 kg is prescribed dopamine at 5 mcg/kg/min. The dopamine
is available as 400 mg in 250 mL D5W. What is the infusion rate in mL/hr?
A. 5.3 mL/hr
B. 6.6 mL/hr
C. 7.9 mL/hr
D. 8.4 mL/hr
Answer: C
Rationale: Step 1: Calculate the dose in mcg/min.
5 mcg/kg/min × 70 kg = 350 mcg/min.
Step 2: Convert to mg/hr.
350 mcg/min × 60 min/hr = 21, 000 mcg/hr = 21 mg/hr.
Step 3: Calculate the infusion rate.
400 mg
Concentration: 250 mL
= 1.6 mg/mL.
21 mg/hr
1.6 mg/mL
= 13.125 mL/hr ≈ 7.9 mL/hr.
The infusion rate is 7.9 mL/hr.
3. A client is prescribed 0.25 mg of digoxin orally. The available tablets are
1
, 0.125 mg. How many tablets should the nurse administer?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Answer: B
mg
Rationale: Calculate: 0.1250.25
mg/tablet
= 2 tablets.
The nurse should administer 2 tablets.
4. A client is to receive 1,000 mL of normal saline over 8 hours. What is the
drip rate in gtt/min using a 15 gtt/mL administration set?
A. 21 gtt/min
B. 31 gtt/min
C. 41 gtt/min
D. 51 gtt/min
Answer: B
Rationale: Step 1: Calculate the infusion rate in mL/hr.
1,000 mL
8 hr
= 125 mL/hr.
Step 2: Convert to mL/min.
125 mL/hr
60 min/hr
= 2.083 mL/min.
Step 3: Calculate gtt/min.
2.083 mL/min × 15 gtt/mL = 31.245 gtt/min ≈ 31 gtt/min.
The drip rate is 31 gtt/min.
5. A client weighing 50 kg is prescribed gentamicin 3 mg/kg/day in three di-
vided doses. How many mg should the nurse administer per dose?
A. 50 mg
B. 75 mg
C. 100 mg
D. 150 mg
Answer: A
Rationale: Step 1: Calculate the total daily dose.
3 mg/kg/day × 50 kg = 150 mg/day.
Step 2: Divide into three doses.
150 mg
3
= 50 mg/dose.
The nurse should administer 50 mg per dose.
6. A client is prescribed 750 mg of vancomycin IV. The available concentration
is 1 g in 200 mL. How many mL should the nurse administer?
A. 120 mL
B. 150 mL
C. 180 mL
D. 200 mL
Answer: B
Rationale: Step 1: Convert 1 g to mg.
1 g = 1, 000 mg.
Step 2: Calculate the concentration.
1,000 mg
200 mL
= 5 mg/mL.
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