Advil is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to treat pain and inflammation. It works by reducing the production of prostaglandins, which are chemicals that cause pain and inflammation in the body [1]. However, taking Advil while also taking blood thinners can increase the risk of bleeding and other complications [2]. Blood thinners, also known as anticoagulants, are medications that help prevent blood clots from forming. They are commonly prescribed to people who have had a heart attack, stroke, or other conditions that increase the risk of blood clots [2].

According to the Advil website, people who are taking blood thinners or who have a bleeding disorder should not take Advil without first consulting their doctor [3]. This is because Advil can increase the risk of bleeding, especially if it is taken in high doses or for a long period of time [2]. In some cases, doctors may recommend that people who are taking blood thinners avoid NSAIDs altogether, or switch to a different type of pain reliever [2].

In conclusion, taking Advil while also taking blood thinners can increase the risk of bleeding and other complications. People who are taking blood thinners or who have a bleeding disorder should talk to their doctor before taking Advil or any other NSAID [2][3].

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.advil.com/advil-safety/pre-existing-health-conditions/