Acetaminophen Dosing and Administration in Children

Administration Considerations

For infants and young children, an appropriate measuring device such as a 3-mL or 5-mL oral syringe should be used for accurate measurement 1

In children with hepatic impairment, doses should be reduced and intervals extended to minimize hepatotoxicity risk 2
In cases of renal impairment, standard dosing can generally be used, but monitoring for accumulation is necessary 2

Chronic exposures greater than 140 mg/kg/day for several days carry a risk of serious liver toxicity and failure 3
Overdose can result in liver and kidney failure, particularly with repeated supratherapeutic ingestions 3
When using combination opioid-acetaminophen products, caution should be exercised to prevent excess acetaminophen dosing 4
The FDA has limited acetaminophen content in prescription combination products to 325 mg per dosage unit 3

If acetaminophen is ineffective for fever management, ibuprofen may be considered as second-line treatment 1