Advil is a brand name for ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce inflammation. According to Drugs.com [2], Advil (ibuprofen) can be taken on an empty stomach or with food. However, taking ibuprofen on an empty stomach may increase the risk of stomach irritation and gastrointestinal bleeding. The Healthline [3] suggests that taking ibuprofen with food or milk can help reduce the risk of stomach irritation. It is also important to follow the recommended dosage and not exceed the maximum daily dose of 1200 mg of ibuprofen for adults. It is advisable to consult a doctor or pharmacist before taking Advil or any medication to ensure it is safe and effective for you.

Sources:
[2] https://www.drugs.com/medical-answers/you-ibuprofen-empty-stomach-3572019/
[3] https://www.healthline.com/health/ibuprofen-on-empty-stomach
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL