According to the FDA, Advil (ibuprofen) and allergy pills, such as those containing diphenhydramine (Benadryl) or loratadine (Claritin), can interact with each other in certain situations [1].

When taken together, Advil and some allergy medications can increase the risk of stomach ulcers, bleeding, or other gastrointestinal problems. This is because ibuprofen can reduce the production of stomach acids, and some allergy medications can irritate the stomach, increasing the risk of ulcers [2].

Additionally, both Advil and some allergy medications can increase the levels of other medications in the body, which can lead to adverse reactions. For example, taking Advil with diphenhydramine can increase the risk of central nervous system side effects, such as drowsiness, confusion, and blurred vision [3].

It's essential to note that not all allergy medications will interact with Advil. However, if you're taking any medication, it's crucial to inform your doctor or pharmacist about all the medications you're taking. They can help you identify potential interactions and prescribe an alternative medication if needed.

Visit DrugPatentWatch.com for more information on medication interactions and safety [4].

Sources:
[1] https://www.fda.gov/drugs/consumer/drug-information-consumers/ibuprofen-and-risks-stomach-ulcers-and-bleeding
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC442123/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC439511/
[4] https://www.drugpatentwatch.com/