Intravenous Paracetamol Dosing for a 6-Year-Old Child (16 kg)
For this 6-year-old child weighing 16 kg, administer 15 mg/kg (240 mg) of intravenous paracetamol every 6 hours, with a maximum daily dose of 60 mg/kg/day (960 mg/day). 1
Dosing Calculation
- Single dose: 15 mg/kg × 16 kg = 240 mg per dose
- Dosing interval: Every 6 hours (4 doses per day)
- Maximum daily dose: 60 mg/kg/day × 16 kg = 960 mg/day
Evidence-Based Rationale
The 15 mg/kg dosing regimen is supported by pharmacokinetic studies demonstrating that this dose achieves therapeutic plasma concentrations comparable to oral and rectal administration while maintaining safety 1. In the pediatric population aged 2-12 years, the recommended regimen is either 12.5 mg/kg every 4 hours or 15 mg/kg every 6 hours 1. The 15 mg/kg every 6 hours regimen is preferred as it provides adequate analgesia and antipyresis with less frequent dosing, improving compliance and reducing nursing burden.
Research confirms that 15 mg/kg every 4-6 hours, up to a total of 60 mg/kg/day, is sufficient to achieve the desired analgesic or antipyretic effect in children 2. This dosing strategy has been validated across multiple studies showing excellent tolerability and efficacy 3.
Critical Safety Considerations
Maximum daily dose must not exceed 60 mg/kg/day (960 mg for this patient) to avoid hepatotoxicity risk. While single acute ingestions exceeding 200 mg/kg or 10 g (whichever is less) within 24 hours warrant emergency evaluation 4, therapeutic dosing at 60 mg/kg/day remains well within the safety margin.
The drug was well tolerated in clinical trials with adverse reactions from IV formulation being extremely rare (<1/10,000) 3. Intravenous paracetamol showed a tolerability profile similar to placebo in controlled studies 3.
Administration Guidelines
- Infuse over 15 minutes to minimize adverse effects
- Use appropriate IV access; intraosseous route is acceptable if IV access cannot be obtained
- Monitor for hypotension during rapid infusion
- Ensure adequate hydration status
Common Pitfalls to Avoid
- Do not use age-banded dosing in hospitalized children: Studies show 20% of patients receive subtherapeutic doses and 4.3% receive supratherapeutic doses with age-based dosing 5. Weight-based dosing is essential for accuracy.
- Do not exceed 4 doses in 24 hours when using the 6-hourly regimen
- Do not confuse with oral dosing: Some oral formulations use 10 mg/kg every 4 hours, but IV dosing follows different pharmacokinetics
- Avoid in hepatic insufficiency: Paracetamol is contraindicated in patients with hepatic insufficiency 2