ATI DOSAGE CALCULATIONS ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)

ATI DOSAGE CALCULATIONS ACTUAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)


Question 1
A client is prescribed amoxicillin 250 mg PO every 8 hours. The medication is
available as a suspension labeled 125 mg/5 mL. How many mL should the
nurse administer per dose?
A) 5 mL
B) 10 mL
C) 15 mL
D) 20 mL
E) 25 mL
Correct Answer: B) 10 mL
Rationale: Desired dose (250 mg) / Available dose (125 mg) x Volume
(5 mL) = 2 x 5 mL = 10 mL.

Question 2
A client is prescribed furosemide 40 mg IV push. The medication is available
in an ampule labeled 10 mg/mL. How many mL should the nurse administer?
A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL
E) 6 mL
Correct Answer: C) 4 mL
Rationale: Desired dose (40 mg) / Available dose (10 mg) x Volume (1
mL) = 4 x 1 mL = 4 mL.

Question 3
An LPN/LVN is preparing to administer dextrose 5% in 0.45% Sodium Chloride
(D5 1/2 NS) at a rate of 100 mL/hour. The drop factor of the manual IV tubing
is 15 gtt/mL. How many drops per minute (gtt/min) should the nurse set the
IV to infuse?
A) 15 gtt/min

,B) 20 gtt/min
C) 25 gtt/min
D) 30 gtt/min
E) 35 gtt/min
Correct Answer: C) 25 gtt/min
Rationale: (Volume (mL) / Time (min)) x Drop Factor (gtt/mL) = (100
mL / 60 min) x 15 gtt/mL = 1.666 x 15 = 24.99 gtt/min, rounded to
25 gtt/min.

Question 4
A pediatric client weighs 22 lb. The physician prescribes amoxicillin 20
mg/kg/day PO divided into three equal doses. How many mg should the
nurse administer per dose?
A) 50 mg
B) 66 mg
C) 100 mg
D) 150 mg
E) 200 mg
Correct Answer: B) 66 mg
Rationale: 1. Convert weight: 22 lb / 2.2 lb/kg = 10 kg. 2. Calculate
total daily dose: 20 mg/kg/day x 10 kg = 200 mg/day. 3. Calculate
dose per administration: 200 mg / 3 doses = 66.66 mg, rounded to
66 mg.

Question 5
A client is prescribed heparin 5,000 units subcutaneous every 12 hours. The
medication is available in a vial labeled 10,000 units/mL. How many mL
should the nurse administer?
A) 0.25 mL
B) 0.5 mL
C) 0.75 mL
D) 1.0 mL

,E) 1.5 mL
Correct Answer: B) 0.5 mL
Rationale: Desired dose (5,000 units) / Available dose (10,000 units) x
Volume (1 mL) = 0.5 x 1 mL = 0.5 mL.

Question 6
A client is prescribed 1000 mL of 0.9% Sodium Chloride (Normal Saline) to
infuse over 8 hours. The drop factor of the manual IV tubing is 20 gtt/mL.
How many drops per minute (gtt/min) should the nurse set the IV to infuse?
A) 21 gtt/min
B) 31 gtt/min
C) 42 gtt/min
D) 52 gtt/min
E) 63 gtt/min
Correct Answer: C) 42 gtt/min
Rationale: (Volume (mL) / Time (min)) x Drop Factor (gtt/mL) = (1000
mL / 480 min) x 20 gtt/mL = 2.083 x 20 = 41.66 gtt/min, rounded to
42 gtt/min.

Question 7
A client is prescribed morphine sulfate 4 mg IV push. The medication is
available in a pre-filled syringe labeled 10 mg/mL. How many mL should the
nurse administer?
A) 0.2 mL
B) 0.4 mL
C) 0.6 mL
D) 0.8 mL
E) 1.0 mL
Correct Answer: B) 0.4 mL
Rationale: Desired dose (4 mg) / Available dose (10 mg) x Volume (1
mL) = 0.4 x 1 mL = 0.4 mL.

, Question 8
A pediatric client weighs 33 lb. The physician prescribes ibuprofen 10
mg/kg/dose PO every 6 hours as needed for pain. How many mg should the
nurse administer per dose?
A) 100 mg
B) 150 mg
C) 180 mg
D) 200 mg
E) 220 mg
Correct Answer: B) 150 mg
Rationale: 1. Convert weight: 33 lb / 2.2 lb/kg = 15 kg. 2. Calculate
dose per administration: 10 mg/kg/dose x 15 kg = 150 mg/dose.

Question 9
A client is prescribed nitroglycerin 50 mg in 250 mL D5W to infuse at 10
mcg/min. How many mL/hour should the nurse set the IV pump?
A) 2 mL/hr
B) 3 mL/hr
C) 6 mL/hr
D) 12 mL/hr
E) 15 mL/hr
Correct Answer: B) 3 mL/hr
Rationale: 1. Convert mg to mcg: 50 mg = 50,000 mcg. 2. Calculate
concentration: 50,000 mcg / 250 mL = 200 mcg/mL. 3. Calculate
mL/min: (10 mcg/min) / (200 mcg/mL) = 0.05 mL/min. 4. Convert to
mL/hr: 0.05 mL/min x 60 min/hr = 3 mL/hr.

Question 10
A client is prescribed prednisone 20 mg PO daily. The medication is available
as tablets labeled 5 mg/tablet. How many tablets should the nurse
administer?
A) 1 tablet