Advil is a brand name for the drug ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain and reduce fever. While Advil is a widely used medication, it is not without risks.

According to the Mayo Clinic [2], some of the most common side effects of ibuprofen include stomach pain, nausea, vomiting, and diarrhea. These side effects can be exacerbated if ibuprofen is taken on an empty stomach, so it is recommended to take it with food or milk.

In addition to stomach issues, ibuprofen can also cause more serious side effects, including high blood pressure, heart attack, and stroke. These risks are higher in people who have preexisting heart or circulatory problems, as well as in people who take high doses of ibuprofen or take it for long periods of time.

According to GoodRx [3], other potential side effects of ibuprofen include allergic reactions, liver and kidney damage, and increased risk of bleeding. It is important to talk to a doctor before taking ibuprofen if you have a history of stomach ulcers, heart disease, or kidney or liver problems.

In addition to these risks, it is also important to note that Advil may interact with other medications, including blood thinners, corticosteroids, and certain antidepressants.

In conclusion, while Advil can be an effective pain reliever, it is not without risks. Some of the most common side effects include stomach pain, nausea, and diarrhea, while more serious side effects can include heart attack, stroke, and liver and kidney damage. It is important to talk to a doctor before taking Advil, especially if you have a history of heart or circulatory problems, stomach ulcers, or kidney or liver problems.

Sources:
[2] https://www.mayoclinic.org/drugs-supplements/ibuprofen-oral-route/side-effects/drg-20070602?p=1
[3] https://www.goodrx.com/advil/advil-side-effects