Tylenol, also known as acetaminophen, is a commonly used pain reliever and fever reducer. It is not a blood thinner [2]. Blood thinners, also known as anticoagulants, are medications that prevent blood clots from forming or getting larger [3]. Examples of blood thinners include warfarin, heparin, and dabigatran [3].

When taken together, there is a potential risk of bleeding for people who take blood thinners and Tylenol [2]. This is because both medications can affect the way the blood clots. Blood thinners can make it harder for the blood to clot, while Tylenol can affect the ability of platelets to stick together, which can increase the risk of bleeding [3].

It is important to note that the risk of bleeding may vary depending on the individual and the dose of each medication taken [2]. People who take blood thinners should consult with their healthcare provider before taking Tylenol or any other medication, including over-the-counter drugs, to ensure that it is safe for them to do so [3].

In addition to Tylenol, other pain relievers such as nonsteroidal anti-inflammatory drugs (NSAIDs) can also increase the risk of bleeding when taken with blood thinners [1]. Therefore, it is important to discuss all medications, including over-the-counter drugs, with a healthcare provider before taking them when on blood thinners [3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/TYLENOL
[2] https://www.healthline.com/health/is-tylenol-a-blood-thinner
[3] https://www.health.harvard.edu/diseases-and-conditions/bad-mix-blood-thinners-and-nsaids