Advil is a brand name for ibuprofen, which belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs) [1]. Aspirin is also an NSAID and has similar properties to ibuprofen. Therefore, taking both drugs together can increase the risk of side effects such as stomach bleeding, ulcers, and kidney problems [2].

According to the FDA, taking ibuprofen and aspirin together should only be done under the guidance of a healthcare professional [3]. This is because the combination of these drugs can increase the risk of cardiovascular events, including heart attack and stroke, especially in individuals with a history of heart disease or stroke.

It is important to note that Advil and aspirin should not be taken together without consulting a healthcare provider. They may recommend an alternative pain relief medication or adjust the dosage of either drug to minimize the risk of adverse effects [2].

In summary, Advil and aspirin are both NSAIDs and should not be taken together without the guidance of a healthcare professional. Combining these drugs can increase the risk of side effects, including stomach bleeding, ulcers, kidney problems, and cardiovascular events. It is important to consult a healthcare provider before taking both drugs simultaneously [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.healthline.com/health/pain-relief/aspirin-ibuprofen
[3] https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/information-about-taking-ibuprofen-and-aspirin-together