Advil is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to treat pain and inflammation. According to Drug Patent Watch [1], Advil contains ibuprofen, which is a non-selective COX inhibitor that works by blocking the production of prostaglandins, which are responsible for pain and inflammation.

However, taking Advil with blood thinners can be dangerous and increase the risk of bleeding. According to Harvard Health Publishing [2], blood thinners such as warfarin, dabigatran, rivaroxaban, and apixaban can interact with NSAIDs like Advil and increase the risk of bleeding. This is because NSAIDs can interfere with the blood-thinning effects of these medications and cause blood clots to form.

It is recommended that patients taking blood thinners avoid taking NSAIDs like Advil unless instructed to do so by their healthcare provider. Patients should also be cautious when taking over-the-counter medications and should always check with their healthcare provider before taking any new medications.

In summary, Advil can interact with blood thinners and increase the risk of bleeding. Patients taking blood thinners should avoid taking NSAIDs like Advil unless instructed to do so by their healthcare provider. It is important to always check with a healthcare provider before taking any new medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.health.harvard.edu/diseases-and-conditions/bad-mix-blood-thinners-and-nsaids
[3] https://www.goodrx.com/health-topic/heart/otc-drugs-to-avoid-on-blood-thinners