Advil is a brand name for ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) that is used to relieve pain, fever, and inflammation. According to [3], Advil may interact with other drugs, including aspirin, blood thinners, corticosteroids, lithium, methotrexate, and selective serotonin reuptake inhibitors (SSRIs). Taking Advil with these medications may increase the risk of side effects, such as bleeding, stomach ulcers, and kidney damage. It is important to consult a doctor or pharmacist before taking Advil with other medications.

Advil may also cause its own set of side effects, as listed on [2]. These include stomach pain, nausea, vomiting, heartburn, headache, dizziness, and drowsiness. In rare cases, Advil may cause more serious side effects, such as allergic reactions, liver damage, and kidney damage. These side effects may be more likely to occur in people who take high doses of Advil for a long time or who have pre-existing medical conditions.

According to [1], Advil is generally considered safe when used as directed. However, it is important to follow the recommended dosage and to talk to a doctor or pharmacist before taking Advil with other medications. It is also important to be aware of the potential side effects of Advil and to seek medical attention if any unusual symptoms occur.

In summary, Advil may interact with other drugs, including aspirin, blood thinners, corticosteroids, lithium, methotrexate, and SSRIs, which may increase the risk of side effects. Advil may also cause its own set of side effects, including stomach pain, nausea, vomiting, heartburn, headache, dizziness, and drowsiness. It is important to follow the recommended dosage and to talk to a doctor or pharmacist before taking Advil with other medications. If any unusual symptoms occur, medical attention should be sought.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.goodrx.com/advil/advil-side-effects
[3] https://www.webmd.com/drugs/2/drug-6143-9368/advil-oral/ibuprofen-oral/details