from the American Academy of Pediatrics
Children under age 2
Call your pediatrician for guidance before giving acetaminophen to a child under 2 years of age, and call right away if your child is under three months of age and has a fever.
Children over age 2
For children over the age of 2 years, check the label to see how much medicine to give. If you know your child's weight, use that. If you do not know your child's weight, go by age for the dose amount.
Important medication safety reminders
Keep all medicines out of reach of children.
Use only the dosing device that comes with the product (do not use a household teaspoon). See "How to Use Liquid Medicines for Children."
Never give adult medicines to children.
Always read and follow the instructions on the label.
If you think your child has taken too much of this or any medicine, call poison control at 800.222.1222
See these links for specific information:
Acetaminophen Dosing Tables for Fever and Pain in Children
How to Use Liquid Medicines for Your Child
Using Over-the-Counter Medicines With Your Child
Medication Safety Tips for Families
American Academy of Pediatrics (Copyright © 2016)