The onset time for Advil's maximum relief varies depending on the individual and the condition being treated [1]. However, according to the manufacturer's information and data from the FDA, Advil starts to work within 20 minutes to one hour after taking the medication, with peak effects occurring within 1-2 hours [2][3].

Pain relief from Advil is primarily due to its active ingredient ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID). Ibuprofen works by blocking the production of prostaglandins, which are hormone-like substances that cause pain and inflammation [4].

It's essential to note that individual results may vary, and the onset time for pain relief from Advil can be affected by several factors, including the dose, frequency of administration, and individual tolerance to the medication [5].

To determine the best dosage and treatment plan, it's recommended to consult with a healthcare professional or follow the instructions provided on the medication label.

Sources:

[1] DrugPatentWatch.com - Ibuprofen (Advil) Patent Expiration Date
[2] Advil Official Website - https://www.pfizer.com/products/product-detail/advil
[3] FDA - Ibuprofen (Advil) - https://www.fda.gov/drugs/drug-availability/ibuprofen-advil
[4] National Institute of General Medical Sciences - Prostaglandins
[5] Mayo Clinic - Ibuprofen - https://www.mayoclinic.org/drugs-supplements/ibuprofen