ATI RN DOSAGE CALCULATIONS –
COMPREHENSIVE EXAM Actual Exam | Medication
Safety & Math Accuracy – Complete Q&A with
Rationales – Pass Guaranteed - A+ Graded
Part 1 – Tablets, Liquids, and Syringes
Q1: The provider orders Lisinopril 20 mg PO daily. You have a bottle of Lisinopril 10 mg
tablets. How many tablets will you administer?
A. 0.5 tablet
B. 1 tablet
C. 2 tablets [CORRECT]
D. 4 tablets
Correct Answer: C
Rationale: Divide the desired dose (20 mg) by the dose on hand (10 mg per tablet). 20
mg ÷ 10 mg = 2 tablets.
Q2: A patient is prescribed Levothyroxine 0.075 mg PO daily. The pharmacy supplies
Levothyroxine 25 mcg tablets. How many tablets should the patient take?
A. 1 tablet
B. 2 tablets
C. 3 tablets [CORRECT]
D. 0.5 tablet
Correct Answer: C
Rationale: First, convert mg to mcg so the units match. 0.075 mg equals 75 mcg. Then
divide 75 mcg by 25 mcg per tablet, which equals 3 tablets.
Q3: The provider orders Amoxicillin 500 mg PO every 8 hours. The medication label
reads "Amoxicillin 250 mg per 5 mL." How many mL will you administer per dose?
A. 5 mL
B. 10 mL [CORRECT]
C. 15 mL
D. 20 mL
Correct Answer: B
Rationale: Using the ratio (250 mg / 5 mL = 500 mg / X mL), cross-multiply to solve for
X. 500 × 5 = 2500, and 2500 ÷ 250 = 10 mL.
, Q4: You need to administer 750 mg of Cephalexin. The suspension available contains
250 mg/5 mL. How many teaspoons should the patient take? (Note: 1 tsp = 5 mL)
A. 1 tsp
B. 2 tsp
C. 3 tsp [CORRECT]
D. 4 tsp
Correct Answer: C
Rationale: Calculate the volume in mL first: 750 mg ÷ (250 mg/5 mL) = 15 mL. Since 1
teaspoon equals 5 mL, divide 15 mL by 5 to get 3 teaspoons.
Q5: Order: Furosemide 40 mg IM push. Available: Furosemide 10 mg/mL. How many
mL will you draw up?
A. 2 mL
B. 4 mL [CORRECT]
C. 0.4 mL
D. 10 mL
Correct Answer: B
Rationale: Desired dose (40 mg) divided by concentration (10 mg/mL) equals 4 mL.
Q6: A patient needs Heparin 5,000 units SQ. The vial available is Heparin 10,000
units/mL. How much will you inject?
A. 0.5 mL [CORRECT]
B. 1 mL
C. 2 mL
D. 5 mL
Correct Answer: A
Rationale: Divide the desired units (5,000) by the concentration (10,000 units/mL).
5,000 ÷ 10,000 = 0.5 mL.
Q7: Convert 1.5 grams to milligrams.
A. 150 mg
B. 1,500 mg [CORRECT]
C. 15,000 mg
D. 0.0015 mg
Correct Answer: B
Rationale: To convert grams to milligrams, multiply by 1,000. 1.5 g × 1,000 = 1,500 mg.
Q8: Convert 0.3 Liters to milliliters.
A. 30 mL
B. 300 mL [CORRECT]
C. 3,000 mL
COMPREHENSIVE EXAM Actual Exam | Medication
Safety & Math Accuracy – Complete Q&A with
Rationales – Pass Guaranteed - A+ Graded
Part 1 – Tablets, Liquids, and Syringes
Q1: The provider orders Lisinopril 20 mg PO daily. You have a bottle of Lisinopril 10 mg
tablets. How many tablets will you administer?
A. 0.5 tablet
B. 1 tablet
C. 2 tablets [CORRECT]
D. 4 tablets
Correct Answer: C
Rationale: Divide the desired dose (20 mg) by the dose on hand (10 mg per tablet). 20
mg ÷ 10 mg = 2 tablets.
Q2: A patient is prescribed Levothyroxine 0.075 mg PO daily. The pharmacy supplies
Levothyroxine 25 mcg tablets. How many tablets should the patient take?
A. 1 tablet
B. 2 tablets
C. 3 tablets [CORRECT]
D. 0.5 tablet
Correct Answer: C
Rationale: First, convert mg to mcg so the units match. 0.075 mg equals 75 mcg. Then
divide 75 mcg by 25 mcg per tablet, which equals 3 tablets.
Q3: The provider orders Amoxicillin 500 mg PO every 8 hours. The medication label
reads "Amoxicillin 250 mg per 5 mL." How many mL will you administer per dose?
A. 5 mL
B. 10 mL [CORRECT]
C. 15 mL
D. 20 mL
Correct Answer: B
Rationale: Using the ratio (250 mg / 5 mL = 500 mg / X mL), cross-multiply to solve for
X. 500 × 5 = 2500, and 2500 ÷ 250 = 10 mL.
, Q4: You need to administer 750 mg of Cephalexin. The suspension available contains
250 mg/5 mL. How many teaspoons should the patient take? (Note: 1 tsp = 5 mL)
A. 1 tsp
B. 2 tsp
C. 3 tsp [CORRECT]
D. 4 tsp
Correct Answer: C
Rationale: Calculate the volume in mL first: 750 mg ÷ (250 mg/5 mL) = 15 mL. Since 1
teaspoon equals 5 mL, divide 15 mL by 5 to get 3 teaspoons.
Q5: Order: Furosemide 40 mg IM push. Available: Furosemide 10 mg/mL. How many
mL will you draw up?
A. 2 mL
B. 4 mL [CORRECT]
C. 0.4 mL
D. 10 mL
Correct Answer: B
Rationale: Desired dose (40 mg) divided by concentration (10 mg/mL) equals 4 mL.
Q6: A patient needs Heparin 5,000 units SQ. The vial available is Heparin 10,000
units/mL. How much will you inject?
A. 0.5 mL [CORRECT]
B. 1 mL
C. 2 mL
D. 5 mL
Correct Answer: A
Rationale: Divide the desired units (5,000) by the concentration (10,000 units/mL).
5,000 ÷ 10,000 = 0.5 mL.
Q7: Convert 1.5 grams to milligrams.
A. 150 mg
B. 1,500 mg [CORRECT]
C. 15,000 mg
D. 0.0015 mg
Correct Answer: B
Rationale: To convert grams to milligrams, multiply by 1,000. 1.5 g × 1,000 = 1,500 mg.
Q8: Convert 0.3 Liters to milliliters.
A. 30 mL
B. 300 mL [CORRECT]
C. 3,000 mL
