After reviewing the provided sources, I can provide the following information regarding the safety of frequent use of Advil:

According to the US Food and Drug Administration (FDA), non-prescription medicines like Advil (ibuprofen) can be used for pain relief and to reduce fever and inflammation. However, like all medications, Advil should be used as directed and not exceed the recommended dosage [3].

The Advil website states that "For adults and children 12 years and older, the recommended dose is one or two 200 mg tablets every 4 to 6 hours, not to exceed 6 tablets in 24 hours, unless directed by a doctor" [2].

A USA Today article reports that frequent use of Advil or other nonsteroidal anti-inflammatory drugs (NSAIDs) can increase the risk of side effects such as stomach ulcers, kidney damage, and heart problems [1]. Therefore, it is important to follow the recommended dosage and consult a healthcare professional before using Advil for an extended period or in high doses.

In conclusion, while Advil can be safe for occasional use as directed, frequent use or exceeding the recommended dosage may increase the risk of side effects. It is always best to consult a healthcare professional for personalized advice on pain relief and medication use.

Sources:
[1] <https://www.usatoday.com/story/news/2023/03/11/how-often-can-you-take-advil/11230106002/>
[2] <https://www.advil.com/faqs-en/advil-pain/>
[3] <https://www.drugpatentwatch.com/p/tradename/ADVIL>