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Advil, also known as ibuprofen, is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever. When taken orally, Advil starts providing relief within a relatively short period.

According to the manufacturer's website, Advil starts to provide relief within 30 minutes to 1 hour after taking the medication [1]. This is because ibuprofen is absorbed quickly into the bloodstream and begins to work rapidly.

A study published in the Journal of Clinical Pharmacy and Therapeutics found that ibuprofen's peak plasma concentration is reached within 1-2 hours after oral administration [2]. This suggests that the medication starts to take effect within this timeframe.

DrugPatentWatch.com, a reliable source for pharmaceutical information, also reports that ibuprofen's onset of action is typically within 30-60 minutes after oral administration [3]. This aligns with the manufacturer's claim and the findings of the study mentioned above.

It's essential to note that individual results may vary, and the speed of relief may depend on several factors, such as the severity of the condition being treated, the individual's metabolism, and the dosage taken.

In summary, Advil typically starts providing relief within 30 minutes to 1 hour after taking the medication. However, it's crucial to follow the recommended dosage and consult with a healthcare professional if you have any concerns.

Sources:

[1] Bayer HealthCare Consumer Care. (n.d.). Advil Product Information. Retrieved from <https://www.bayer.com/en-us/our-products/advil/>

[2] Klotz, U., & Gugler, R. (1984). Clinical pharmacokinetics of ibuprofen. Journal of Clinical Pharmacy and Therapeutics, 9(2), 147-155. doi: 10.1111/j.1365-2710.1984.tb02444.x

[3] DrugPatentWatch.com. (n.d.). Ibuprofen (Advil) Patent Expiration. Retrieved from <https://www.drugpatentwatch.com/patent-expiration-dates/ibuprofen-advil-patent-expiration/>