The typical time frame for Advil to work on headaches varies depending on the individual and the severity of the headache. In general, ibuprofen, the active ingredient in Advil, begins to exert its pain-relieving effects within 30 minutes to an hour after administration [1]. However, some studies suggest that the maximum effect of ibuprofen may take up to 2-4 hours to achieve [2].

A study published in the Journal of Pain Research found that ibuprofen 400mg provided significant pain relief in approximately 30 minutes, with peak effects observed between 1-2 hours [3].

It's worth noting that the effectiveness of Advil can be influenced by various factors, such as the dosage, individual tolerance, and the presence of other medical conditions. As with any medication, it's essential to follow the recommended dosage and consult with a healthcare professional if your headaches persist or worsen over time.

Sources:

[1] https://www.drugpatentwatch.com/patent/US-4741944
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4144344/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6471130/
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