HESI Pediatric Medication Dosage
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Section 1: Weight-Based Dose Calculations (Questions 1–20)
1. A child weighs 44 lbs. The order is for amoxicillin 25 mg/kg/day divided q12h.
What is the individual dose?
• A) 250 mg
• B) 500 mg
• C) 750 mg
• D) 1000 mg
Rationale: 44 lbs ÷ 2.2 = 20 kg. 25 mg/kg/day × 20 kg = 500 mg/day. Divided
q12h = 250 mg/dose? Wait—check: 500 mg/day ÷ 2 doses = 250 mg/dose.
Correction: Correct answer should be 250 mg? Let me recalc carefully.
Correction: 44 lb = 20 kg. 25 mg/kg/day × 20 kg = 500 mg total per day. Divide by
2 (q12h) = 250 mg per dose. The correct answer is 250 mg (not listed as bold
above—error spotted). In the exam, ensure option A is 250 mg and bolded. For this
sample, adjust:
Corrected Q1:
A) 250 mg
B) 500 mg
C) 750 mg
D) 1000 mg
Rationale: Weight in kg = lb/2.2 = 20 kg. Daily dose = 25 × 20 = 500 mg. Per
dose (q12h) = 250 mg.
,2. A toddler weighs 13.2 lb. Prescription: furosemide 1 mg/kg/dose IV once. How
many mg will the nurse give?
• A) 4 mg
• B) 5 mg
• C) 6 mg
• D) 13 mg
Rationale: 13.2 lb ÷ 2.2 = 6 kg. Dose = 1 mg/kg × 6 kg = 6 mg.
3. Order: ceftriaxone 50 mg/kg IV daily. Child weighs 33 lb. Available: 100
mg/mL. How many mL?
• A) 3.75 mL
• B) 7.5 mL
• C) 15 mL
• D) 22.5 mL
Rationale: 33 lb ÷ 2.2 = 15 kg. Dose = 50 × 15 = 750 mg. Volume = 750/100 = 7.5
mL.
4. A 6-month-old weighing 7 kg needs digoxin 10 mcg/kg IV loading dose.
Digoxin elixir 50 mcg/mL. How many mL?
• A) 0.7 mL
• B) 1.4 mL
• C) 2.1 mL
• D) 3.5 mL
Rationale: Dose = 10 × 7 = 70 mcg. Volume = 70/50 = 1.4 mL.
5. A child is ordered ondansetron 0.15 mg/kg IV. Weight = 44 lb. Available: 2
mg/mL. How many mL?
• A) 0.75 mL
• B) 1.5 mL
• C) 3 mL
, • D) 4.5 mL
Rationale: 44 lb = 20 kg. Dose = 0.15 × 20 = 3 mg. Volume = 3/2 = 1.5 mL.
6. Methylprednisolone 2 mg/kg IV push. Child weighs 66 lb. Available 40 mg/mL.
How many mL?
• A) 1.5 mL
• B) 3 mL
• C) 4.5 mL
• D) 6 mL
Rationale: 66 lb ÷ 2.2 = 30 kg. Dose = 2 × 30 = 60 mg. Volume = 60/40 = 1.5 mL.
7. A toddler weighs 10 kg. Order: acyclovir 500 mg/m² IV q8h. BSA = 0.5 m².
How many mg per dose?
• A) 125 mg
• B) 250 mg
• C) 375 mg
• D) 500 mg
Rationale: 500 mg/m² × 0.5 m² = 250 mg.
8. A child has BSA 0.8 m². Order: methotrexate 12 mg/m² PO weekly. How many
mg?
• A) 6.4 mg
• B) 9.6 mg
• C) 12 mg
• D) 15 mg
Rationale: 12 × 0.8 = 9.6 mg.
9. Order: IVIG 1 g/kg. Child weighs 33 lb. How many grams?
• A) 15 g
• B) 30 g
Exam (2026 Edition)|| questions and
answers with rationales/graded
A+/2026 update/100% correct /instant
download
Section 1: Weight-Based Dose Calculations (Questions 1–20)
1. A child weighs 44 lbs. The order is for amoxicillin 25 mg/kg/day divided q12h.
What is the individual dose?
• A) 250 mg
• B) 500 mg
• C) 750 mg
• D) 1000 mg
Rationale: 44 lbs ÷ 2.2 = 20 kg. 25 mg/kg/day × 20 kg = 500 mg/day. Divided
q12h = 250 mg/dose? Wait—check: 500 mg/day ÷ 2 doses = 250 mg/dose.
Correction: Correct answer should be 250 mg? Let me recalc carefully.
Correction: 44 lb = 20 kg. 25 mg/kg/day × 20 kg = 500 mg total per day. Divide by
2 (q12h) = 250 mg per dose. The correct answer is 250 mg (not listed as bold
above—error spotted). In the exam, ensure option A is 250 mg and bolded. For this
sample, adjust:
Corrected Q1:
A) 250 mg
B) 500 mg
C) 750 mg
D) 1000 mg
Rationale: Weight in kg = lb/2.2 = 20 kg. Daily dose = 25 × 20 = 500 mg. Per
dose (q12h) = 250 mg.
,2. A toddler weighs 13.2 lb. Prescription: furosemide 1 mg/kg/dose IV once. How
many mg will the nurse give?
• A) 4 mg
• B) 5 mg
• C) 6 mg
• D) 13 mg
Rationale: 13.2 lb ÷ 2.2 = 6 kg. Dose = 1 mg/kg × 6 kg = 6 mg.
3. Order: ceftriaxone 50 mg/kg IV daily. Child weighs 33 lb. Available: 100
mg/mL. How many mL?
• A) 3.75 mL
• B) 7.5 mL
• C) 15 mL
• D) 22.5 mL
Rationale: 33 lb ÷ 2.2 = 15 kg. Dose = 50 × 15 = 750 mg. Volume = 750/100 = 7.5
mL.
4. A 6-month-old weighing 7 kg needs digoxin 10 mcg/kg IV loading dose.
Digoxin elixir 50 mcg/mL. How many mL?
• A) 0.7 mL
• B) 1.4 mL
• C) 2.1 mL
• D) 3.5 mL
Rationale: Dose = 10 × 7 = 70 mcg. Volume = 70/50 = 1.4 mL.
5. A child is ordered ondansetron 0.15 mg/kg IV. Weight = 44 lb. Available: 2
mg/mL. How many mL?
• A) 0.75 mL
• B) 1.5 mL
• C) 3 mL
, • D) 4.5 mL
Rationale: 44 lb = 20 kg. Dose = 0.15 × 20 = 3 mg. Volume = 3/2 = 1.5 mL.
6. Methylprednisolone 2 mg/kg IV push. Child weighs 66 lb. Available 40 mg/mL.
How many mL?
• A) 1.5 mL
• B) 3 mL
• C) 4.5 mL
• D) 6 mL
Rationale: 66 lb ÷ 2.2 = 30 kg. Dose = 2 × 30 = 60 mg. Volume = 60/40 = 1.5 mL.
7. A toddler weighs 10 kg. Order: acyclovir 500 mg/m² IV q8h. BSA = 0.5 m².
How many mg per dose?
• A) 125 mg
• B) 250 mg
• C) 375 mg
• D) 500 mg
Rationale: 500 mg/m² × 0.5 m² = 250 mg.
8. A child has BSA 0.8 m². Order: methotrexate 12 mg/m² PO weekly. How many
mg?
• A) 6.4 mg
• B) 9.6 mg
• C) 12 mg
• D) 15 mg
Rationale: 12 × 0.8 = 9.6 mg.
9. Order: IVIG 1 g/kg. Child weighs 33 lb. How many grams?
• A) 15 g
• B) 30 g
