Medicines for children are dosed differently from adults because the right amount depends largely on the child's weight and age. This is why two children of the same age may need different amounts. For this reason, always use the dosing instructions on the specific product you have, or ask a pharmacist or doctor, rather than relying on memory or an adult formulation.
Use the measuring syringe or cup that comes with the medicine, not a kitchen spoon, which is inaccurate. Check the concentration printed on the bottle, because liquid strengths differ between infant and older-child products, and giving the wrong strength is a common cause of dosing errors.
Never exceed the maximum number of doses in 24 hours stated on the label, and do not combine two products that both contain paracetamol. If your child is very small, premature, has liver problems, or you are unsure, check with a pharmacist or doctor before giving any dose.