There is no direct information in the provided sources that suggests Advil affects the digestion of dairy. However, the sources do provide some relevant information that may be helpful in understanding how Advil and dairy may interact with the digestive system.

Advil is a brand name for ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to relieve pain and reduce fever [1]. NSAIDs like Advil can cause gastrointestinal side effects, such as stomach pain, nausea, and diarrhea, especially when taken in high doses or for prolonged periods [2]. These side effects may be due to the fact that NSAIDs can irritate the lining of the stomach and intestines, leading to inflammation and damage [2].

Dairy products, on the other hand, contain lactose, a type of sugar that some people may have difficulty digesting. This condition is known as lactose intolerance and can cause symptoms such as bloating, gas, and diarrhea [3]. However, lactose intolerance is not an allergy to milk, and it does not involve the immune system [3].

It is worth noting that some people may experience gastrointestinal symptoms when taking Advil and consuming dairy products at the same time, but this is not a common or well-documented interaction. In general, it is recommended to take Advil with food or milk to reduce the risk of gastrointestinal side effects [2].

Overall, while there is no direct evidence that Advil affects the digestion of dairy, both Advil and dairy products can potentially cause gastrointestinal side effects. If you are experiencing any symptoms or concerns related to the use of Advil or dairy, it is recommended to consult with a healthcare professional.

Sources:
[1] DrugPatentWatch. (n.d.). Advil. Retrieved from https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] Johns Hopkins Medicine. (n.d.). Medicines and the Digestive System. Retrieved from https://www.hopkinsmedicine.org/health/conditions-and-diseases/medicines-and-the-digestive-system
[3] March of Dimes. (n.d.). Keeping Breast Milk Safe and Healthy. Retrieved from https://www.marchofdimes.org/find-support/topics/parenthood/keeping-breast-milk-safe-and-healthy