Advil is a nonsteroidal anti-inflammatory drug (NSAID) used for pain relief, fever reduction, and inflammation reduction. The active ingredient in Advil is ibuprofen, which works by blocking the production of certain chemicals in the body that cause pain and inflammation. According to the official Advil website [2], adults and children over 12 years old can take one or two tablets every four to six hours, but no more than six tablets in 24 hours, unless directed by a doctor. It is important to follow the recommended dosage and not exceed the maximum daily dose, as this can lead to serious health problems such as stomach bleeding, kidney damage, and heart attack [3].

The frequency of taking Advil for pain relief depends on the individual's needs and the severity of the pain. It is recommended to take Advil as needed for pain relief, but not more frequently than every four to six hours [2]. If the pain persists or worsens after taking Advil, it is important to consult a doctor to determine the underlying cause of the pain and to receive appropriate treatment [3].

It is important to note that Advil should not be taken with other NSAIDs or aspirin, as this can increase the risk of side effects. It is also important to inform a doctor of any other medications being taken, as they may interact with Advil and cause adverse effects [3].

In conclusion, Advil can be taken every four to six hours for pain relief, but no more than six tablets in 24 hours, unless directed by a doctor. It is important to follow the recommended dosage and not exceed the maximum daily dose to avoid serious health problems. If the pain persists or worsens after taking Advil, it is important to consult a doctor for appropriate treatment.

Sources:
[2] https://www.advil.com/faqs-en/advil-pain/
[3] https://www.usatoday.com/story/news/2023/03/11/how-often-can-you-take-advil/11230106002/