Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce fever [1]. However, some people may be allergic to Advil or ibuprofen. The U.S. Food and Drug Administration (FDA) requires all NSAIDs, including ibuprofen, to carry a warning label about the risk of allergic reactions, including hives, facial swelling, asthma (wheezing), shock, and skin reddening [2].

Symptoms of ibuprofen allergy may include skin rash, itching, swelling of the face, tongue, or throat, difficulty breathing, and abdominal pain [3]. In rare cases, ibuprofen allergy can lead to anaphylaxis, which is a severe and potentially life-threatening allergic reaction that requires immediate medical attention.

If you suspect that you are allergic to Advil or ibuprofen, you should stop taking the medication and seek medical attention. Your doctor may perform skin tests or blood tests to confirm the allergy and prescribe alternative medications to manage your pain or fever [3].

In conclusion, Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug used to relieve pain and reduce fever. However, some people may be allergic to Advil or ibuprofen, and symptoms of ibuprofen allergy may include skin rash, itching, swelling of the face, tongue, or throat, difficulty breathing, and abdominal pain. If you suspect that you are allergic to Advil or ibuprofen, you should stop taking the medication and seek medical attention [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/ibuprofen-drug-facts-label
[3] https://www.news-medical.net/health/Ibuprofen-Allergy-Symptoms-Diagnosis-Treatment.aspx