Advil is a brand name for the drug ibuprofen, which belongs to the class of drugs called nonsteroidal anti-inflammatory drugs (NSAIDs) [3]. Advil is used to relieve pain, reduce fever, and decrease inflammation. It works by blocking the production of certain chemicals in the body that cause inflammation, pain, and fever [3].

It is important to note that while Advil can be effective in relieving pain, it is not without risks. NSAIDs like ibuprofen have been linked to an increased risk of liver and kidney damage, especially with long-term use or at high doses [2]. It is important to follow the recommended dosage and duration of use to minimize the risk of these side effects.

In terms of how quickly Advil works, it typically takes about 30 minutes to an hour to start working [3]. However, the exact timing can vary depending on factors such as the individual's metabolism, the severity of the pain, and whether or not the medication is taken with food.

In summary, Advil (ibuprofen) is a type of NSAID that works by blocking the production of certain chemicals in the body that cause pain, inflammation, and fever. While it can be effective in relieving pain, it is important to follow the recommended dosage and duration of use to minimize the risk of side effects. It typically takes about 30 minutes to an hour to start working, but the timing can vary depending on individual factors.

Sources:
[2] https://www.goodrx.com/classes/nsaids/nsaids-ibuprofen-bad-liver-kidneys
[3] https://www.hopkinsallchildrens.org/Patients-Families/Health-Library/HealthDocNew/How-Do-Pain-Relievers-Work
[4] https://www.drugpatentwatch.com/p/tradename/ADVIL