Advil is a brand name for the generic drug ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce inflammation. Ibuprofen is available over-the-counter (OTC) without a prescription and can be found at most pharmacies and drugstores. The generic version of Advil is widely available under various brand names, such as Motrin and Nurofen, as well as store-brand versions. It is important to note that while generic drugs are required to have the same active ingredients as their brand-name counterparts, they may have different inactive ingredients that can affect their effectiveness and side effects. Therefore, it is recommended to consult with a healthcare provider before taking any medication, including generic ibuprofen. [2][3]

Sources:
[2] https://www.mayoclinic.org/drugs-supplements/ibuprofen-oral-route/description/drg-20070602
[3] https://www.theatlantic.com/health/archive/2015/03/generic-drugs-the-same-but-not/388592/