Acetaminophen (Tylenol) Dosing for an 8.6 kg, 8-month-old Infant
The recommended acetaminophen dose for an 8.6 kg, 8-month-old infant is 10-15 mg/kg/dose, which equals 86-129 mg per dose, given every 4-6 hours as needed, not to exceed 5 doses in 24 hours.
Dosing Calculation
For an 8.6 kg infant:
- Minimum dose: 10 mg/kg × 8.6 kg = 86 mg
- Maximum dose: 15 mg/kg × 8.6 kg = 129 mg
Administration Guidelines
Formulation Options
- Infant liquid acetaminophen (160 mg/5 mL): 2.7-4.0 mL per dose
- Use a calibrated dosing syringe or cup for accurate measurement
Dosing Schedule
- Give every 4-6 hours as needed for fever or pain
- Do not exceed 5 doses in 24 hours
- Maximum daily dose: 75 mg/kg/day (645 mg for this infant)
Important Considerations
Safety Precautions
- Always verify the concentration of acetaminophen product before administering
- Never use adult formulations without proper measurement
- Do not use for more than 3 consecutive days for fever or 5 days for pain without consulting a healthcare provider
When to Seek Medical Attention
- If fever persists beyond 3 days
- If pain persists beyond 5 days
- If symptoms worsen despite treatment
- If new symptoms develop
Common Errors to Avoid
- Confusing infant and children's formulations (different concentrations)
- Using household spoons instead of calibrated measuring devices
- Administering doses too frequently
- Giving acetaminophen simultaneously with combination products that also contain acetaminophen
Special Considerations
- For persistent fever, alternating with ibuprofen may be considered for infants over 6 months, but only under healthcare provider guidance
- Ensure adequate hydration during treatment
Remember that acetaminophen is generally considered the safest analgesic and antipyretic for infants when used at appropriate doses, but careful attention to dosing is essential to prevent potential hepatotoxicity from overdosing.