Final answer:
The best method to administer liquid medicine to a 9-month-old child is by using a syringe placed next to the tongue, ensuring safety and proper dosage.
Step-by-step explanation:
The appropriate method to administer liquid medicine to a 9-month-old child is to administer the medication with a syringe next to the tongue. This method minimizes the risk of aspiration and ensures that the child receives the full dosage of the medication. It's important to deliver the medicine slowly and gently, allowing the infant to swallow it comfortably.
Administering medication with a syringe by placing it next to the infant's tongue is often seen as the safest and most effective method for infants, as it helps to avoid any spillage or refusal that might occur with a spoon or cup. Moreover, mixing the medicine with formula could lead to under-dosage if the child does not finish the entire bottle. Keeping the child upright during administration may assist with swallowing, but the best device for administering the liquid is a syringe specifically designed for this purpose.