This is especially true for children because the right dose of acetaminophen depends on its age and weight.

You should never give your child;
-an adult product if they're younger than age 12
-more than the recommended dose in a 24-hour period
-more than one medication that contains acetaminophen at the same time, such as;
                -a pain reliever
                -cold and flu medicine

Find out how children can safely be given acetaminophen by consulting the dosage guide here.