Advil, also known as ibuprofen, is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used for pain relief. Doxycycline is an antibiotic that is used to treat bacterial infections. According to the sources provided, there are potential drug interactions between Advil and doxycycline.

Taking Advil and doxycycline together may increase the risk of side effects, such as stomach bleeding or ulcers [2]. The NHS website states that taking NSAIDs like Advil can increase the risk of side effects from doxycycline, including stomach pain, diarrhea, and nausea [2].

The Drugs.com website also warns of potential interactions between Advil and doxycycline. It recommends that patients should be monitored for signs of bleeding or bruising if they take these medications together [3].

Therefore, it is important to talk to a healthcare provider before taking Advil and doxycycline together. They can advise on the appropriate pain relief options and ensure that there are no potential interactions or contraindications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.nhs.uk/medicines/doxycycline/side-effects-of-doxycycline/
[3] https://www.drugs.com/drug-interactions/advil-with-doxycycline-1310-782-940-0.html