Advil is a brand name for the drug ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain, fever, and inflammation [1]. According to the manufacturer's website, Advil can be taken with or without food, but taking it with food may help to reduce stomach upset [3]. However, Healthline recommends taking ibuprofen on an empty stomach to maximize its effectiveness, as food can slow down its absorption [2].

As for the question of how long to wait after eating to take Advil, neither of the sources provide a specific time frame. However, it is generally recommended to wait at least 30 minutes to an hour after eating before taking any medication to ensure that the stomach is empty and the medication can be absorbed properly. It is also important to follow the dosing instructions on the label and not to exceed the recommended dose [2][3].

In summary, Advil (ibuprofen) can be taken with or without food, but taking it with food may help to reduce stomach upset. It is recommended to wait at least 30 minutes to an hour after eating before taking any medication, including Advil. It is important to follow the dosing instructions on the label and not to exceed the recommended dose.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.healthline.com/health/ibuprofen-on-empty-stomach
[3] https://www.advil.com/faqs-en/advil-pain/