WGU HESI Dosage Calculation Real
Practice Exam With Actual Questions
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Rationales/Expert Verified For
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1. The provider orders 500 mg of amoxicillin PO every 8 hours. The medication is
available in 250 mg tablets. How many tablets should the nurse administer per dose?
a) 1 tablet
b) 2 tablets
c) 2.5 tablets
d) 3 tablets
Rationale: 500 mg ÷ 250 mg = 2 tablets per dose.
2. The order is for heparin 7,500 units subcutaneously. Available is heparin 10,000
units/mL. How many mL will the nurse administer?
a) 0.5 mL
b) 0.75 mL
c) 0.25 mL
d) 1 mL
Rationale: 7,500 ÷ 10,000 = 0.75 mL.
3. A patient is to receive 2 g of cefazolin IVPB. The vial is labeled 1 g/5 mL. How many
mL should the nurse draw up?
a) 5 mL
b) 10 mL
c) 15 mL
d) 20 mL
Rationale: 2 g = 2,000 mg. Each 1 g = 5 mL. Therefore, 2 g = 10 mL.
4. The provider orders 600 mg of ibuprofen. The available dose is 300 mg per tablet.
How many tablets will the nurse give?
, a) 1
b) 2
c) 3
d) 4
Rationale: 600 ÷ 300 = 2 tablets.
5. The order reads: Digoxin 0.125 mg PO daily. Available: Digoxin 0.25 mg tablets. How
many tablets should be administered?
a) 0.25 tablet
b) 0.5 tablet
c) 0.5 tablet
d) 1 tablet
Rationale: 0.125 ÷ 0.25 = 0.5 tablet.
6. A patient weighs 132 lb. The order is for 2 mg/kg of a medication. How many mg
should the patient receive?
a) 100 mg
b) 120 mg
c) 125 mg
d) 130 mg
Rationale: 132 lb ÷ 2.2 = 60 kg. 60 × 2 = 120 mg.
7. A child weighs 25 kg. The safe dose range is 10–15 mg/kg. What is the safe range for
this child?
a) 100–200 mg
b) 250–375 mg
c) 300–400 mg
d) 200–350 mg
Rationale: 25 × 10 = 250 mg; 25 × 15 = 375 mg.
8. The order is for vancomycin 1 g in 250 mL NS over 2 hours. What is the infusion rate
in mL/hr?
a) 100 mL/hr
b) 110 mL/hr
c) 125 mL/hr
d) 150 mL/hr
Rationale: 250 ÷ 2 = 125 mL/hr.
9. A patient is prescribed potassium chloride 40 mEq in 500 mL NS to infuse over 4
hours. What is the infusion rate in mL/hr?
a) 100 mL/hr
b) 125 mL/hr
c) 150 mL/hr
, d) 175 mL/hr
Rationale: 500 ÷ 4 = 125 mL/hr.
10. A provider orders 15 units of insulin. The available syringe is calibrated in 100
units/mL. How many mL should the nurse draw?
a) 0.1 mL
b) 0.15 mL
c) 0.2 mL
d) 0.3 mL
Rationale: 15 ÷ 100 = 0.15 mL.
11. The order is for morphine 4 mg IV. The vial is 2 mg/mL. How many mL should the
nurse administer?
a) 1 mL
b) 2.5 mL
c) 2 mL
d) 4 mL
Rationale: 4 ÷ 2 = 2 mL.
12. The physician orders furosemide 40 mg IV push. Available is furosemide 20 mg/mL.
How many mL will the nurse give?
a) 1 mL
b) 2 mL
c) 3 mL
d) 4 mL
Rationale: 40 ÷ 20 = 2 mL.
13. A patient is prescribed 50 mg diphenhydramine. Available: 25 mg tablets. How many
tablets should be administered?
a) 1
b) 2
c) 3
d) 4
Rationale: 50 ÷ 25 = 2 tablets.
14. A child is prescribed amoxicillin 250 mg PO every 8 hours. The suspension is 125
mg/5 mL. How many mL per dose?
a) 5 mL
b) 10 mL
c) 15 mL
d) 20 mL
Rationale: 250 ÷ 125 × 5 = 10 mL.
Practice Exam With Actual Questions
& Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass 2025/2026 /Latest
Update/Instant Download Pdf
1. The provider orders 500 mg of amoxicillin PO every 8 hours. The medication is
available in 250 mg tablets. How many tablets should the nurse administer per dose?
a) 1 tablet
b) 2 tablets
c) 2.5 tablets
d) 3 tablets
Rationale: 500 mg ÷ 250 mg = 2 tablets per dose.
2. The order is for heparin 7,500 units subcutaneously. Available is heparin 10,000
units/mL. How many mL will the nurse administer?
a) 0.5 mL
b) 0.75 mL
c) 0.25 mL
d) 1 mL
Rationale: 7,500 ÷ 10,000 = 0.75 mL.
3. A patient is to receive 2 g of cefazolin IVPB. The vial is labeled 1 g/5 mL. How many
mL should the nurse draw up?
a) 5 mL
b) 10 mL
c) 15 mL
d) 20 mL
Rationale: 2 g = 2,000 mg. Each 1 g = 5 mL. Therefore, 2 g = 10 mL.
4. The provider orders 600 mg of ibuprofen. The available dose is 300 mg per tablet.
How many tablets will the nurse give?
, a) 1
b) 2
c) 3
d) 4
Rationale: 600 ÷ 300 = 2 tablets.
5. The order reads: Digoxin 0.125 mg PO daily. Available: Digoxin 0.25 mg tablets. How
many tablets should be administered?
a) 0.25 tablet
b) 0.5 tablet
c) 0.5 tablet
d) 1 tablet
Rationale: 0.125 ÷ 0.25 = 0.5 tablet.
6. A patient weighs 132 lb. The order is for 2 mg/kg of a medication. How many mg
should the patient receive?
a) 100 mg
b) 120 mg
c) 125 mg
d) 130 mg
Rationale: 132 lb ÷ 2.2 = 60 kg. 60 × 2 = 120 mg.
7. A child weighs 25 kg. The safe dose range is 10–15 mg/kg. What is the safe range for
this child?
a) 100–200 mg
b) 250–375 mg
c) 300–400 mg
d) 200–350 mg
Rationale: 25 × 10 = 250 mg; 25 × 15 = 375 mg.
8. The order is for vancomycin 1 g in 250 mL NS over 2 hours. What is the infusion rate
in mL/hr?
a) 100 mL/hr
b) 110 mL/hr
c) 125 mL/hr
d) 150 mL/hr
Rationale: 250 ÷ 2 = 125 mL/hr.
9. A patient is prescribed potassium chloride 40 mEq in 500 mL NS to infuse over 4
hours. What is the infusion rate in mL/hr?
a) 100 mL/hr
b) 125 mL/hr
c) 150 mL/hr
, d) 175 mL/hr
Rationale: 500 ÷ 4 = 125 mL/hr.
10. A provider orders 15 units of insulin. The available syringe is calibrated in 100
units/mL. How many mL should the nurse draw?
a) 0.1 mL
b) 0.15 mL
c) 0.2 mL
d) 0.3 mL
Rationale: 15 ÷ 100 = 0.15 mL.
11. The order is for morphine 4 mg IV. The vial is 2 mg/mL. How many mL should the
nurse administer?
a) 1 mL
b) 2.5 mL
c) 2 mL
d) 4 mL
Rationale: 4 ÷ 2 = 2 mL.
12. The physician orders furosemide 40 mg IV push. Available is furosemide 20 mg/mL.
How many mL will the nurse give?
a) 1 mL
b) 2 mL
c) 3 mL
d) 4 mL
Rationale: 40 ÷ 20 = 2 mL.
13. A patient is prescribed 50 mg diphenhydramine. Available: 25 mg tablets. How many
tablets should be administered?
a) 1
b) 2
c) 3
d) 4
Rationale: 50 ÷ 25 = 2 tablets.
14. A child is prescribed amoxicillin 250 mg PO every 8 hours. The suspension is 125
mg/5 mL. How many mL per dose?
a) 5 mL
b) 10 mL
c) 15 mL
d) 20 mL
Rationale: 250 ÷ 125 × 5 = 10 mL.
