Advil is a nonsteroidal anti-inflammatory drug (NSAID) that is used to treat pain, fever, and inflammation [1]. According to GoodRx, Advil can cause gastrointestinal side effects, including stomach pain, nausea, and heartburn [2]. The risk of these side effects is increased when Advil is taken on an empty stomach or for an extended period of time.

To reduce the risk of gastrointestinal side effects, the Hospital for Special Surgery recommends taking Advil with food or milk [3]. Additionally, it is recommended to avoid taking Advil with alcohol or other NSAIDs, as this can increase the risk of stomach bleeding and other serious side effects.

It is important to note that not everyone will experience gastrointestinal side effects when taking Advil. However, if you experience any symptoms such as stomach pain or nausea, it is recommended to stop taking Advil and consult with your healthcare provider.

In conclusion, Advil can cause gastrointestinal side effects, but taking it with food or milk can help reduce the risk of these side effects. It is important to talk to your healthcare provider if you experience any symptoms while taking Advil.

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