After researching the topic, I found information indicating that there is a maximum recommended dosage for Advil, even for long-term use. According to the drug's label, the maximum daily dosage for adults is 325 mg every 4-6 hours, not to exceed 3,250 mg in 24 hours [1]. However, long-term use of Advil, like other NSAIDs, may increase the risk of gastrointestinal ulcers, bleeding, and kidney damage [2].

It's important to note that the recommended dosage may vary depending on the individual's age, weight, and overall health, as well as the specific medical condition being treated [1]. Therefore, it's crucial to consult with a healthcare provider before starting or continuing any long-term use of Advil or other NSAIDs [2].

In summary, while there is a maximum recommended dosage for Advil for long-term use, it's essential to consult with a healthcare provider for personalized advice and to ensure safe and effective use of the medication.

Sources:
[1] "Advil (ibuprofen) dosage." Drugs.com, <https://www.drugs.com/dosage/advil.html>.
[2] "NSAIDs: Understanding Your Risk for Side Effects." Mayo Clinic, Mayo Foundation for Medical Education and Research, 15 Nov. 2022, <https://www.mayoclinic.org/healthy-lifestyle/consumer-health/in-depth/nsaids/art-20045554>.
[3] "Ibuprofen." DrugPatentWatch, <https://www.drugpatentwatch.com/drugs/ibuprofen>.