Advil is a brand name for ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, reduce fever, and decrease inflammation [1]. However, the use of Advil has been linked to several side effects, including stomach pain. According to GoodRx, stomach pain is one of the most common side effects of Advil [2]. The stomach pain can be caused by the irritation of the stomach lining, which can lead to ulcers and bleeding [3].

To reduce the risk of stomach pain and other side effects, the Hospital for Special Surgery recommends taking the lowest effective dose of Advil for the shortest duration possible [3]. It is also important to take Advil with food or milk to help protect the stomach lining. Additionally, people who are at a higher risk of stomach problems, such as those with a history of ulcers or gastrointestinal bleeding, should avoid using Advil and choose alternative pain relief options [3].

In conclusion, Advil use has been linked to stomach pain, which can be caused by the irritation of the stomach lining. To reduce the risk of stomach pain and other side effects, it is important to take the lowest effective dose of Advil for the shortest duration possible, take it with food or milk, and avoid using it if you are at a higher risk of stomach problems [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.goodrx.com/advil/advil-side-effects
[3] https://www.hss.edu/conditions_guidelines-reduce-side-effects-nsaids.asp