Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce fever [1]. The NHS recommends taking ibuprofen with or after food to reduce the risk of stomach irritation [2]. Advil's official website also suggests taking the medication with food or milk to help prevent stomach upset [3]. Therefore, it is recommended to take Advil with food or after eating. It is important to follow the recommended dosage and to consult with a healthcare provider if you have any questions or concerns about taking Advil [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.nhs.uk/medicines/ibuprofen-for-adults/how-and-when-to-take-ibuprofen/
[3] https://www.advil.com/faqs-en/advil-pain/