Main ingredient in advil?

What is the main ingredient in Advil?

Advil’s main active ingredient is ibuprofen. [1]

What does ibuprofen do in Advil?

Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID). It helps reduce pain, fever, and inflammation. [1]

Are there different Advil products with different ingredients?

Some Advil products are formulated for different purposes (for example, different release types), but ibuprofen remains the active ingredient in Advil-branded pain/fever medicines. [1]

Sources:
[1] https://www.drugs.com/brand/advil.html