NCLEX Review Guide: Pediatric Oral Medication Administration and Calculations

Weight-Based Calculations

• Pediatric doses are calculated based on body weight (mg/kg/day or mg/kg/dose) rather than standard adult doses due to differences in metabolism, organ function, and body surface area.
• Always convert pounds to kilograms (divide by 2.2) before calculating medication doses to ensure accuracy and prevent potentially fatal dosing errors.
• Body Surface Area (BSA) calculations may be used for chemotherapy or high-risk medications using the formula: BSA = √(height × weight)/3600.

1. Convert child's weight to kg if given in pounds
2. Identify the prescribed dose per kg
3. Multiply weight × dose per kg = total dose needed
4. Verify dose falls within safe range
5. Calculate volume needed based on concentration

Age-Appropriate Administration Methods

• Infants (0-12 months) should receive liquid medications using oral syringes or droppers, never honey-based preparations due to botulism risk.
• Toddlers (1-3 years) may resist medication; use positive reinforcement, allow choices when possible, and consider mixing with small amounts of food if not contraindicated.
• School-age children (6-12 years) can often swallow small tablets or capsules and benefit from age-appropriate explanations about their medication.

Common Pitfalls

• Confusing mg/kg/day with mg/kg/dose - always clarify total daily dose versus individual dose amounts.
• Forgetting to convert pounds to kilograms before calculating, leading to significant overdosing errors.
• Using adult formulations instead of pediatric concentrations, resulting in volume administration issues.

Quick Check Questions

• □ Can you convert 22 lbs to kg? (Answer: 10 kg)
• □ What's the maximum volume for IM injection in a 6-month-old? (Answer: 0.5-1 mL)
• □ Which medications should never be crushed? (Answer: Enteric-coated, extended-release, sublingual)