Advil is a brand name for ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce inflammation. According to a Harvard Health Publishing article [3], NSAIDs can interfere with the blood-thinning effects of anticoagulant medications, increasing the risk of bleeding. Therefore, it is recommended to avoid taking NSAIDs, including Advil, when taking blood thinners, such as warfarin or aspirin.

The website GoodRx [2] also advises against taking Advil or other NSAIDs while on blood thinners, as it can increase the risk of bleeding and bruising.

Drug Patent Watch [1] provides information on the active ingredient in Advil, ibuprofen. It states that ibuprofen can cause gastrointestinal bleeding, which can be severe in patients taking anticoagulants.

In conclusion, taking Advil while on blood thinners can increase the risk of bleeding and bruising. Patients taking blood thinners should consult their healthcare provider before taking any over-the-counter medications, including Advil. If pain relief is needed, alternative medications such as acetaminophen may be recommended.

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