Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, reduce fever, and decrease inflammation. Like any medication, Advil may cause side effects. The most common side effects of Advil include upset stomach, heartburn, nausea, vomiting, constipation, diarrhea, bloating, gas, dizziness, headache, nervousness, and skin rash [3]. In rare cases, Advil may cause serious side effects such as stomach bleeding, kidney damage, liver damage, allergic reactions, and high blood pressure [2]. People who take Advil for a long time or in high doses are more likely to experience side effects [1]. It is important to follow the recommended dosage and talk to a healthcare provider if you have any concerns about taking Advil.

Sources:
[1] Drug Patent Watch. (n.d.). Advil. Retrieved from https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] GoodRx. (2021). Advil Side Effects. Retrieved from https://www.goodrx.com/advil/advil-side-effects
[3] Mayo Clinic. (2021). Ibuprofen (Oral Route) Side Effects. Retrieved from https://www.mayoclinic.org/drugs-supplements/ibuprofen-oral-route/side-effects/drg-20070602?p=1