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Pediatric Dosage Calculations

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This focused study guide explains the principles and step‑by‑step methods of pediatric dosage calculations, equipping nursing and pharmacy students to prepare safe, accurate drug doses for infants and children. Content includes weight‑based (mg / kg) and body‑surface‑area (BSA) formulas, Clark’s and Young’s rules, dilution and concentration adjustments, IV infusion and syringe‑pump rate calculations, and error‑prevention checkpoints. Clear worked examples and practice questions reinforce each technique, making this resource ideal for medication‑math tests, NCLEX and HESI preparation, and everyday clinical reference in pediatric settings.

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Pediatric Dosage Calculations
Body surface area (BSA) is expressed as ____________________. - meters squared m2



Calculate pediatric dose by using Clark's rule, Young's rule, or Fried's rule.

Determine the dose of cortisone for a 75 lb child if the adult dose is equivalent to 100 mg. - 50
mg



Calculate pediatric dose by using Clark's rule, Young's rule, or Fried's rule.

Determine the dose of digoxin for a 50 lb child if the adult dose is equivalent to 1 mg orally, in
divided doses, over 24 hours. - 1/3 mg



Calculate pediatric dose by using Clark's rule, Young's rule, or Fried's rule.

Find the dose of acetaminophen for a 3-year-old child if the adult dose normally equals 1000
mg - 200 mg



Calculate pediatric dose by using Clark's rule, Young's rule, or Fried's rule.

Find the dose of chloroquine hydrochloride for a 7-year-old child if the adult dose normally
equals 600 mg orally. - 221 mg



Calculate pediatric dose by using Clark's rule, Young's rule, or Fried's rule.

Find the dose of phenobarbital for an 8-month-old infant if the adult dose equals 400 mg - 21
mg



Calculate the amount of intravenous fluid to be added to the volume control chamber.

Ordered: Ancef 0.42 g IV q12h in 30 mL D5 NS over 30 min by volume control set on an infusion
controller. Flush with 15 mL.

On hand: Ancef 500 mg / 5 mL

Total IV fluid volume: __________ mL

, Flow rate: __________ mL / h




13 lb = Kg - 5.9 kg



19 lb 15 oz = Kg - 9.1 kg



25 lb = Kg - 11.4 kg



29 lb = Kg - 13.2 kg



32 lb 6 oz = Kg - 14.7 kg



55 lb 13 oz = Kg - 25.4 kg



58 lb = Kg - 26.4 kg



7 lb 4 oz = Kg - 3.3 kg



72 lb = Kg - 32.7 kg



82 lb = Kg - 37.3 kg



Add __________ mL Ancef and __________ mL D5 NS to the chamber. - 45; 90; 4.2; 30

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June 30, 2025
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