Dose of pcm in children
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paracetamol dose children mg/kg pediatric 2024
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Here is a complete summary of Paracetamol (PCM) dosing in children:
Paracetamol (Acetaminophen) - Pediatric Dosing
Standard Therapeutic Dose
| Parameter | Dose |
|---|---|
| Per dose | 10-15 mg/kg/dose |
| Route | Oral (PO) or Rectal |
| Frequency | Every 4-6 hours |
| Max doses/day | 4-5 doses in 24 hours |
| Max daily dose | 60-75 mg/kg/day (not to exceed 4 g/day in older/larger children) |
Source: The Essentials of Forensic Medicine & Toxicology (2026 ed.) and Park's Textbook of Preventive & Social Medicine
Age/Weight-Based Quick Reference (Oral Syrup)
| Age | Typical Dose |
|---|---|
| 2-3 months | ~60 mg/dose (weight-based preferred) |
| 3-12 months | 60-120 mg/dose |
| 1-5 years | 120-250 mg/dose |
| 6-12 years | 250-500 mg/dose |
| >12 years | 500-1000 mg/dose (adult dosing) |
IV Paracetamol (Post-op / Hospital use)
- Neonates & infants <10 kg: 7.5 mg/kg every 8 hours
- Children 10-50 kg: 15 mg/kg every 6 hours (max 60 mg/kg/day)
- Children >50 kg: adult dose (1 g every 6 hours, max 4 g/day)
Important Safety Points
- Do not use in children <2 months unless on medical advice
- Toxic dose: ≥150-200 mg/kg (single ingestion) - can cause hepatotoxicity via NAPQI accumulation
- Lethal dose: >250-350 mg/kg in children
- Children have lower hepatic glucuronide conjugating ability, making them more susceptible to toxicity at high doses
- Antidote for overdose: N-Acetylcysteine (NAC)
- Avoid repeated supratherapeutic dosing - a common cause of toxicity in children (not just single overdose)
Formulations Available
| Formulation | Strength |
|---|---|
| Oral suspension | 120 mg/5 mL (for <6 yrs), 250 mg/5 mL (for 6+ yrs) |
| Suppository | 60, 125, 250 mg |
| Tablet/Caplet | 500 mg |
| IV infusion | 10 mg/mL |
Key rule: Always dose by weight (mg/kg), not by age alone. The HSE weight-based dosing chart (March 2024) and BNFC guidelines are practical references for prescribers.
What should i consider 10 or 25 as dose
The standard dose is 15 mg/kg/dose - that's the most widely recommended single dose for both fever and pain in children. The 10-15 mg/kg range exists because the right dose depends on the clinical situation.
10 mg/kg vs 15 mg/kg - When to Use Which
Use 15 mg/kg (higher end) when:
- Fever - needs stronger antipyretic effect
- Moderate pain - post-op, injury, ear pain
- First dose of a course
- Child is otherwise healthy with normal liver function
- Most routine clinical use - 15 mg/kg is the standard go-to dose
Use 10 mg/kg (lower end) when:
- Mild symptoms - low-grade fever, minor discomfort
- Malnourished child - reduced glutathione stores increase toxicity risk
- Liver disease or jaundice - reduced metabolic capacity
- Neonates / very young infants - immature liver enzymes
- Frequent repeated dosing - if giving every 4 hours, use lower end to stay within daily max
- Already on other hepatotoxic drugs
The Key Rule for Daily Max
| Dose used | Frequency | Daily total |
|---|---|---|
| 15 mg/kg x 4 doses | Every 6 hrs | 60 mg/kg/day - safe |
| 15 mg/kg x 5 doses | Every 4-5 hrs | 75 mg/kg/day - upper limit, caution |
| 10 mg/kg x 5 doses | Every 4-5 hrs | 50 mg/kg/day - safe buffer |
If you plan to give 5 doses/day, use 10-12 mg/kg per dose to avoid exceeding the 60-75 mg/kg/day ceiling.
What Most Guidelines Recommend
- WHO, IAP, BNFC: 15 mg/kg/dose as the standard single dose
- Park's Textbook: 10-15 mg/kg, max 100 mg/kg/day (older IAP figure - now revised downward)
- Forensic Medicine (2026 ed.): max 60 mg/kg/day
- BNFC (current): max 75 mg/kg/day
Bottom Line
For a routine, healthy child with fever or pain - use 15 mg/kg every 6 hours (4 doses/day). That is both effective and safe. Drop to 10 mg/kg if the child is at higher risk (liver issues, malnutrition, very young age, or frequent dosing).
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