It is generally safe to take Advil (ibuprofen) with allergy medications. Advil is a nonsteroidal anti-inflammatory drug (NSAID) that can help relieve pain and reduce inflammation, while allergy medications are often antihistamines that help alleviate allergy symptoms. However, it is always recommended to consult with a healthcare provider or pharmacist before combining medications to ensure there are no potential interactions or contraindications. When traveling with medications like Advil, it is advised to keep them in their original packaging or in a pill case to facilitate security checks, as per the Transportation Security Administration (TSA) guidelines. Additionally, it is important to follow dosing instructions and be aware of any potential side effects when combining medications. [1][2][3]

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.tsa.gov/travel/travel-tips/can-you-pack-your-meds-pill-case-and-more-questions-answered
[3] https://www.advil.com/advil-safety/combining-medications/