Aspirin and Advil are both pain relievers, but they belong to different classes of drugs. Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) while Advil is a brand name for ibuprofen, which is also an NSAID. Both drugs are available over the counter, but they have different uses, side effects, and precautions.

Aspirin is primarily used to relieve pain, reduce fever, and prevent blood clots. It is also used to prevent heart attacks, strokes, and certain types of cancer. Aspirin works by blocking the production of prostaglandins, which are responsible for pain, inflammation, and fever. Aspirin can cause side effects such as stomach upset, bleeding, and allergic reactions. It is not recommended for children under 12 years of age, pregnant women, and people with bleeding disorders or ulcers.

Advil, on the other hand, is used to relieve pain, reduce fever, and reduce inflammation. It is commonly used to treat headaches, menstrual cramps, arthritis, and other types of pain. Advil works by blocking the production of prostaglandins, similar to aspirin. However, Advil is less likely to cause stomach upset and bleeding than aspirin. It can still cause side effects such as nausea, dizziness, and allergic reactions. Advil is not recommended for people with a history of heart disease, high blood pressure, kidney disease, or stomach ulcers.

In summary, both aspirin and Advil are effective pain relievers, but they have different uses and precautions. Aspirin is primarily used to prevent blood clots and reduce the risk of heart attacks and strokes, while Advil is primarily used to relieve pain and reduce inflammation. It is important to follow the recommended dosage and precautions for each drug, and to consult a healthcare professional if you have any questions or concerns.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] https://www.goodrx.com/advil/advil-aspirin
[3] https://blog.walgreens.com/health/pain-management/acetaminophen-vs-aspirin-vs-ibuprofen.html