Advil, also known as ibuprofen, is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to relieve pain and reduce inflammation. Blood thinners, also known as anticoagulants, are medications that help prevent blood clots from forming in the body. The question of whether Advil can reduce the effectiveness of blood thinners is a valid concern for those taking both medications.

According to Drug Patent Watch [1], there are no known drug interactions between Advil and blood thinners. However, this does not mean that taking Advil while on blood thinners is completely safe. The Harvard Health Blog [2] warns that NSAIDs like Advil can increase the risk of bleeding when taken with blood thinners. This is because both medications can interfere with the blood's ability to clot. The risk of bleeding is especially high for those taking high doses of NSAIDs or blood thinners.

GoodRx [3] also advises against taking NSAIDs like Advil when on blood thinners. They suggest using alternative pain relievers such as acetaminophen (Tylenol) or topical creams to manage pain. It is important to note that even though these alternatives may be safer for those on blood thinners, they should still be taken with caution and only under the guidance of a healthcare professional.

In conclusion, while there are no known drug interactions between Advil and blood thinners, taking NSAIDs like Advil while on blood thinners can increase the risk of bleeding. It is recommended to use alternative pain relievers and to always consult with a healthcare professional before taking any medication.

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