The timing of when you may start feeling better after taking Advil (ibuprofen) can vary depending on the individual and the condition being treated. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever. According to the National Health Service (NHS), ibuprofen usually starts to work within an hour, with the effects typically lasting for around 4 to 6 hours. However, the full benefits of ibuprofen may take longer to be felt, especially for conditions like arthritis where it may take a few weeks of regular use to see significant improvement.

It is important to note that while Advil can provide relief relatively quickly, it is crucial to follow the recommended dosage and guidelines provided by healthcare professionals to ensure its safe and effective use. If you are unsure about the appropriate dosage or have any concerns about taking Advil, it is advisable to consult a healthcare provider for personalized advice.

Sources:
[1] https://www.nhs.uk/medicines/ibuprofen-for-adults/common-questions-about-ibuprofen-for-adults/
[2] https://www.drugpatentwatch.com/p/tradename/ADVIL