Aspirin is a medication that has been used for decades to treat pain, fever, and inflammation. It has also been found to be effective in preventing heart attacks and strokes in some individuals. The recommended dose of aspirin for prevention varies depending on the individual's risk factors and medical history.

According to the Mayo Clinic [2], the recommended dose of aspirin for prevention is typically between 81 milligrams (mg) and 325 mg per day. However, it is important to note that aspirin therapy is not appropriate for everyone. The decision to take aspirin for prevention should be made in consultation with a healthcare provider, who can help determine whether the benefits of aspirin outweigh the risks for an individual.

The Houston Methodist [3] suggests that the new guidelines recommend against routine aspirin use for the primary prevention of heart attacks and strokes in people who are at low risk. For those at higher risk, the guidelines recommend a low-dose aspirin regimen of 81 mg per day. However, the guidelines also suggest that aspirin therapy may not be appropriate for everyone and should be discussed with a healthcare provider.

Drug Patent Watch [1] provides information on the various brand names and formulations of aspirin that are available. However, it does not provide information on the recommended dose for prevention.

In summary, the recommended dose of aspirin for prevention varies depending on the individual's risk factors and medical history. It is important to consult with a healthcare provider before starting aspirin therapy for prevention. For those at higher risk, a low-dose aspirin regimen of 81 mg per day may be recommended. However, aspirin therapy may not be appropriate for everyone.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] https://www.mayoclinic.org/diseases-conditions/heart-disease/in-depth/daily-aspirin-therapy/art-20046797
[3] https://www.houstonmethodist.org/blog/articles/2021/oct/daily-low-dose-aspirin-for-heart-attack-prevention-who-should-take-it-what-the-new-guidelines-mean/