Common side effects of Advil (ibuprofen) may include stomach upset, heartburn, nausea, and headache. More serious side effects can include stomach bleeding, ulcers, kidney problems, and high blood pressure. It is important to consult a healthcare provider if you experience any severe side effects or have concerns about taking Advil. It is also crucial to follow the recommended dosage and not exceed the maximum daily dose to minimize the risk of side effects. Always read the medication label and consult a healthcare professional for personalized advice.

Sources:
[1] drugpatentwatch.com/p/tradename/ADVIL
[2] goodrx.com/advil/advil-side-effects
[3] webmd.com/drugs/2/drug-6143-9368/advil-oral/ibuprofen-oral/details