Both Advil and aspirin are nonsteroidal anti-inflammatory drugs (NSAIDs) that are used to treat pain, fever, and inflammation. However, they work in slightly different ways and have different potential side effects.

According to the sources provided, there is no specific time frame mentioned for how long after taking Advil one can take aspirin. However, it is generally recommended to wait at least four to six hours between taking different NSAIDs to avoid the risk of overdose and potential side effects [2].

It is important to note that taking both Advil and aspirin together can increase the risk of gastrointestinal bleeding, ulcers, and other complications. Therefore, it is best to consult with a healthcare provider before taking these medications together or in close succession [3].

In summary, there is no specific time frame mentioned for how long after taking Advil one can take aspirin. However, it is generally recommended to wait at least four to six hours between taking different NSAIDs to avoid the risk of overdose and potential side effects. It is important to consult with a healthcare provider before taking these medications together or in close succession to avoid potential complications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://fherehab.com/learning/aspirin-and-nasaid
[3] https://www.medicalnewstoday.com/articles/322793