Pediatric dose calculations based on body weight MCQs With Answer

Pediatric dose calculations based on body weight MCQs With Answer

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Pediatric dose calculations based on body weight MCQs With Answer are essential for B.Pharm students to master safe, accurate medication dosing in children. This introduction covers core concepts like mg/kg dosing, unit conversions, concentration-to-volume calculations, dose rounding, BSA-based dosing, dilution and reconstitution, and maximum daily limits. Emphasis on pediatric pharmacotherapy, drug concentration, weight-based dosing, and calculation strategies helps reduce dosing errors and improves clinical decision-making. These practice MCQs deepen understanding of pharmacy calculations, clinical reasoning, and practical preparation of pediatric formulations. Now let’s test your knowledge with 30 MCQs on this topic.

Q1. If the prescribed dose is 10 mg/kg and a child weighs 12 kg, what is the total dose?

  • 120 mg
  • 12 mg
  • 100 mg
  • 1.2 g

Correct Answer: 120 mg

Q2. A medication concentration is 250 mg/5 mL. What is the concentration in mg/mL?

  • 25 mg/mL
  • 50 mg/mL
  • 5 mg/mL
  • 0.05 mg/mL

Correct Answer: 50 mg/mL

Q3. For a 15 kg child prescribed 8 mg/kg, how many milligrams are required?

  • 120 mg
  • 180 mg
  • 80 mg
  • 15 mg

Correct Answer: 120 mg

Q4. Using a syrup of 50 mg/mL, how many mL deliver a 150 mg dose?

  • 1 mL
  • 2 mL
  • 3 mL
  • 4 mL

Correct Answer: 3 mL

Q5. A neonate weighs 3200 g. Convert this weight to kilograms for dosing calculations.

  • 0.32 kg
  • 32 kg
  • 3.2 kg
  • 320 kg

Correct Answer: 3.2 kg

Q6. Recommended dose: 20 mg/kg/day divided into 4 equal doses. For a 10 kg child, what is each dose?

  • 50 mg every dose
  • 20 mg every dose
  • 200 mg every dose
  • 10 mg every dose

Correct Answer: 50 mg every dose

Q7. Which dosing strategy is preferred for most chemotherapeutic agents in pediatrics?

  • mg/kg dosing
  • fixed adult dose
  • BSA (mg/m²) dosing
  • age-based dosing only

Correct Answer: BSA (mg/m²) dosing

Q8. Using Mosteller formula BSA = sqrt((height cm × weight kg)/3600), calculate approximate BSA for a child 16 kg and 90 cm tall.

  • 0.63 m²
  • 1.2 m²
  • 0.3 m²
  • 0.95 m²

Correct Answer: 0.63 m²

Q9. A vial contains 500 mg powder to be reconstituted to 10 mL. After reconstitution, concentration is:

  • 50 mg/mL
  • 5 mg/mL
  • 5000 mg/mL
  • 0.05 mg/mL

Correct Answer: 50 mg/mL

Q10. If a drug order is 0.5 mg/kg and child weighs 22 kg, what is the dose in mg?

  • 11 mg
  • 0.5 mg
  • 44 mg
  • 110 mg

Correct Answer: 11 mg

Q11. A safe rounding rule in pediatric dosing is to round to the nearest:

  • measurable device increment (e.g., 0.1 mL or 5 mg)
  • whole gram regardless of formulation
  • nearest 100 mg always
  • nearest 1 L

Correct Answer: measurable device increment (e.g., 0.1 mL or 5 mg)

Q12. Prescribed dose: 15 mg/kg. For a child 18 kg, total dose is:

  • 270 mg
  • 150 mg
  • 120 mg
  • 36 mg

Correct Answer: 270 mg

Q13. A suspension is labeled 125 mg/5 mL. How many mL are needed for a 250 mg dose?

  • 10 mL
  • 5 mL
  • 20 mL
  • 2 mL

Correct Answer: 10 mL

Q14. If recommended maximum single dose is 10 mg/kg and child weighs 7 kg, maximum single dose is:

  • 70 mg
  • 7 mg
  • 700 mg
  • 0.7 mg

Correct Answer: 70 mg

Q15. A drug order: 0.25 mg/kg. For an infant of 4 kg, how many micrograms is the dose? (1 mg = 1000 µg)

  • 1000 µg
  • 250 µg
  • 4000 µg
  • 0.25 µg

Correct Answer: 1000 µg

Q16. For a 20 kg child, an order of 12 mg/kg/day given in three equal doses equals each dose of:

  • 80 mg
  • 240 mg
  • 12 mg
  • 20 mg

Correct Answer: 80 mg

Q17. A stock solution 2 mg/mL; to administer 5 mg, the volume required is:

  • 2.5 mL
  • 0.4 mL
  • 10 mL
  • 1 mL

Correct Answer: 2.5 mL

Q18. A child needs 45 mg of medication. Available tablets are 15 mg each. How many tablets should be given?

  • 3 tablets
  • 4 tablets
  • 2 tablets
  • 1 tablet

Correct Answer: 3 tablets

Q19. An order: 30 mg/kg/day divided every 8 hours for a 9 kg child. Dose per administration is:

  • 90 mg
  • 30 mg
  • 270 mg
  • 10 mg

Correct Answer: 90 mg

Q20. You dilute 10 mL of a 100 mg/mL solution with 90 mL of diluent. New concentration is:

  • 10 mg/mL
  • 100 mg/mL
  • 1 mg/mL
  • 0.1 mg/mL

Correct Answer: 10 mg/mL

Q21. A pediatric dose chart lists 2 mg/kg for a drug. For a 14 kg child, the dose rounded to practical syringe increments (0.1 mL) using a 10 mg/mL formulation equals:

  • 2.8 mL
  • 0.28 mL
  • 28 mL
  • 0.028 mL

Correct Answer: 2.8 mL

Q22. Which factor is most critical when converting adult doses to pediatric doses?

  • Body weight and developmental pharmacokinetics
  • Color of tablet
  • Adult dosing frequency only
  • Manufacturer’s logo

Correct Answer: Body weight and developmental pharmacokinetics

Q23. If a liquid concentration is 1 mg/mL and required dose is 250 µg, volume to administer is:

  • 0.25 mL
  • 2.5 mL
  • 25 mL
  • 0.025 mL

Correct Answer: 0.25 mL

Q24. A prescription demands 75 mg for a child. You have 25 mg/5 mL syrup. Required volume is:

  • 15 mL
  • 5 mL
  • 25 mL
  • 3 mL

Correct Answer: 15 mL

Q25. When calculating pediatric doses, which statement is true regarding maximum adult dose?

  • Never exceed pediatric maximums even if adult dose higher
  • Always give full adult dose to adolescents regardless of weight
  • Adult dose is primary; pediatric is optional
  • Ignore weight for children over 1 year

Correct Answer: Never exceed pediatric maximums even if adult dose higher

Q26. A child requires 0.02 g/kg and weighs 25 kg. Calculate the dose in mg. (1 g = 1000 mg)

  • 500 mg
  • 50 mg
  • 5 mg
  • 2000 mg

Correct Answer: 500 mg

Q27. A concentrated solution is 400 mg/2 mL. What volume gives a 100 mg dose?

  • 0.5 mL
  • 1 mL
  • 2 mL
  • 0.25 mL

Correct Answer: 0.5 mL

Q28. For pediatric osmolarity concerns, which approach is safest when preparing oral solutions?

  • Limit concentration to recommended pediatric formulations and dilute if needed
  • Use highest concentration to minimize volume
  • Ignore osmolarity in children
  • Mix multiple concentrated drugs together

Correct Answer: Limit concentration to recommended pediatric formulations and dilute if needed

Q29. A three-times-daily regimen means dosing interval approximately every:

  • 8 hours
  • 12 hours
  • 6 hours
  • 24 hours

Correct Answer: 8 hours

Q30. A child weighing 18 kg has a drug ordered at 0.1 mg/kg. Available ampoule contains 2 mg/2 mL. What volume provides the ordered dose?

  • 0.9 mL
  • 0.18 mL
  • 1.8 mL
  • 9 mL

Correct Answer: 0.9 mL

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