Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce inflammation [3]. According to Mayo Clinic, ibuprofen is usually taken every 4 to 6 hours as needed for pain or fever. However, the maximum amount of ibuprofen for adults is 800 milligrams per dose or 3200 mg per day [2]. It is important to follow the recommended dosage and not exceed the maximum amount of ibuprofen per day, as it may cause serious side effects such as stomach bleeding, kidney problems, and heart attack [2][3].

Drug Patent Watch provides information on the patent status of Advil, but does not provide any information on the maximum duration of Advil use [1]. Therefore, it is recommended to follow the dosage instructions provided by the healthcare provider or the label on the Advil packaging. If the pain or fever persists or worsens after a few days of Advil use, it is recommended to consult a healthcare provider [2][3].

In conclusion, the maximum duration of Advil use is not provided by the sources. However, it is important to follow the recommended dosage and not exceed the maximum amount of ibuprofen per day to avoid serious side effects. If the pain or fever persists or worsens after a few days of Advil use, it is recommended to consult a healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.mayoclinic.org/drugs-supplements/ibuprofen-oral-route/proper-use/drg-20070602
[3] https://www.drugs.com/advil.html