See the DrugPatentWatch profile for advil

Based on the information provided, I can tell you that Advil, also known as ibuprofen, is a non-prescription, non-steroidal anti-inflammatory drug (NSAID) commonly used to treat pain, reduce fever, and alleviate inflammation. However, the onset of its effects may vary from person to person.

Generally, Advil starts to relieve pain within 30 minutes to 2 hours after taking the medication [1]. This timeframe can be influenced by several factors, including the individual's metabolism, the presence of food in the stomach, and the dosage taken.

It is important to follow the recommended dosage on the package or as directed by a healthcare professional. Overdosing on Advil can lead to serious side effects, such as stomach ulcers, kidney damage, and liver problems [1].

In conclusion, you can generally expect Advil to ease your headache within 30 minutes to 2 hours. However, individual responses may vary. If your headache persists or worsens after taking Advil, it is advisable to consult a healthcare professional.

Sources:
[1] DrugPatentWatch.com. (n.d.). Ibuprofen. Retrieved from <https://www.drugpatentwatch.com/drugs/ibuprofen>