Advil is a nonsteroidal anti-inflammatory drug (NSAID) that contains ibuprofen as its active ingredient. According to the official Advil website [2], it can be taken with or without food. However, it is recommended to take Advil with food or milk if you experience stomach upset after taking it. This is because Advil can irritate the stomach lining, which can lead to gastrointestinal problems such as stomach ulcers, bleeding, or perforation [3].

It is important to note that taking Advil with certain types of food may affect its absorption rate and efficacy. For example, taking Advil with a high-fat meal may delay its absorption and reduce its effectiveness [3]. On the other hand, taking Advil with a small snack or a glass of milk may help to improve its absorption and reduce the risk of stomach irritation [2].

It is also important to follow the recommended dosage and frequency of Advil use, as taking too much of it or using it for a prolonged period of time can increase the risk of side effects and complications [1]. If you have any concerns about taking Advil with food or its proper use, it is recommended to consult with a healthcare professional.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.advil.com/faqs-en/advil-pain/
[3] https://www.drugs.com/medical-answers/you-ibuprofen-empty-stomach-3572019/