Taking Advil with blood thinners can increase the risk of bleeding and bruising. Advil contains ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID). NSAIDs can interfere with the blood-thinning effects of medications such as warfarin and aspirin, which are commonly used to prevent blood clots. According to the Harvard Health Publishing, taking NSAIDs with blood thinners can increase the risk of bleeding, especially in the stomach and intestines. This can lead to gastrointestinal bleeding, ulcers, and even death in severe cases [2].

Moreover, GoodRx warns that taking Advil with blood thinners can also increase the risk of stroke and heart attack. Blood thinners are prescribed to prevent blood clots, which can lead to heart attack and stroke. However, taking Advil can reduce the effectiveness of blood thinners, which can increase the risk of these life-threatening conditions [3].

It is important to note that not all pain relievers are harmful when taken with blood thinners. Acetaminophen (Tylenol) is a safer alternative to NSAIDs for people taking blood thinners. However, it is always recommended to consult with a healthcare provider before taking any new medication, especially if you are taking blood thinners [2][3].

In conclusion, taking Advil with blood thinners can increase the risk of bleeding, gastrointestinal problems, stroke, and heart attack. It is important to talk to your healthcare provider before taking any new medication while on blood thinners to avoid any potential adverse effects [2][3].

Sources:
[2] Harvard Health Publishing. Bad mix: Blood thinners and NSAIDs. https://www.health.harvard.edu/diseases-and-conditions/bad-mix-blood-thinners-and-nsaids
[3] GoodRx. OTC Drugs to Avoid on Blood Thinners. https://www.goodrx.com/health-topic/heart/otc-drugs-to-avoid-on-blood-thinners