Tylenol and Advil are both popular over-the-counter pain relievers that are used to treat various types of pain. However, they have different active ingredients and mechanisms of action. Tylenol contains acetaminophen, while Advil contains ibuprofen [3].

Acetaminophen is used to treat mild to moderate pain and fever, while ibuprofen is used to treat mild to moderate pain, fever, and inflammation [2]. Acetaminophen works by blocking the production of prostaglandins, which are chemicals that cause pain and fever [1]. Ibuprofen works by blocking the production of prostaglandins and other inflammatory chemicals [3].

While both Tylenol and Advil can be used to treat pain, they have different side effects and risks. Tylenol can cause liver damage if taken in high doses or combined with alcohol [2]. Advil can cause stomach bleeding and kidney damage if taken in high doses or for a long time [3].

In general, Tylenol is a better choice for treating pain and fever in children and for people with stomach problems, while Advil is a better choice for treating pain and inflammation in adults [2]. However, it is important to follow the dosing instructions on the label and to talk to a doctor or pharmacist before taking either medication, especially if you have any underlying medical conditions or are taking other medications [2].

In conclusion, Tylenol and Advil are both effective pain relievers, but they have different active ingredients and mechanisms of action. It is important to choose the right medication based on your symptoms and medical history, and to follow the dosing instructions on the label. If you have any questions or concerns, talk to a doctor or pharmacist [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/TYLENOL
[2] https://www.mercycare.org/healthy-living/health-education/tylenol--advil--when-to-use-which/
[3] https://www.goodrx.com/ibuprofen/advil-ibuprofen-vs-tylenol-acetaminophen-side-effects