Advil, also known as ibuprofen, is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce fever. According to the Drug Patent Watch [1], there are no known interactions between Advil and blood thinners. However, it is important to note that blood thinners, such as warfarin, dabigatran, and apixaban, can increase the risk of bleeding. NSAIDs, including Advil, can also increase the risk of bleeding, especially when taken in high doses or for a long time. This can be a dangerous combination, as it can increase the risk of bleeding in the stomach or intestines, as well as other parts of the body.

According to Harvard Health Publishing [2], taking NSAIDs with blood thinners can increase the risk of bleeding by up to 10 times. This risk is higher in older adults and those with a history of stomach ulcers or bleeding disorders. Therefore, it is recommended that people taking blood thinners avoid taking NSAIDs, including Advil, unless directed by their doctor.

GoodRx [3] also advises against taking NSAIDs, including Advil, while on blood thinners. They recommend using acetaminophen (Tylenol) instead for pain relief. Acetaminophen does not have the same blood-thinning effects as NSAIDs and is generally considered safer for people taking blood thinners.

In conclusion, while there are no known interactions between Advil and blood thinners, taking NSAIDs with blood thinners can increase the risk of bleeding. Therefore, it is recommended that people taking blood thinners avoid taking NSAIDs, including Advil, unless directed by their doctor. Acetaminophen is a safer alternative for pain relief in people taking blood thinners.

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