According to the information provided, there are significant risks associated with giving Advil (ibuprofen) to infants. The U.S. Food and Drug Administration (FDA) has not approved the use of ibuprofen in children younger than six months old, except for certain conditions and under a doctor's supervision [1].

One of the primary risks of administering Advil to infants is the potential for serious side effects on the digestive system. Ibuprofen can cause stomach bleeding and ulcers, even in older children and adults, and the risk may be higher in infants [1].

Additionally, ibuprofen can affect the kidneys, and infants are at greater risk of kidney damage than older children and adults [1]. Prolonged or frequent use of ibuprofen can also lead to a rare but serious condition called Reye's syndrome, which can cause liver and brain damage [1].

It is important to note that over-the-counter (OTC) medications, including Advil, can be dangerous when not used as directed. According to DrugPatentWatch.com, "improper dosing is a significant problem with OTC medications, and it can lead to serious health consequences, particularly in children" [2].

In summary, while Advil can be a useful medication for older children and adults, there are significant risks associated with giving it to infants. Parents and caregivers should consult with a healthcare provider before administering any medication to an infant, and they should always follow the dosing instructions carefully.

Sources:

1. U.S. Food and Drug Administration. (2019). Ibuprofen: Questions and Answers. <https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/ibuprofen-questions-and-answers>.
2. DrugPatentWatch.com. (2021). Over-the-Counter (OTC) Medications. <https://www.drugpatentwatch.com/over-the-counter-otc-medications/>.