Advil Dual Action is a pain reliever that combines the power of two active ingredients, ibuprofen and acetaminophen, to provide fast and effective relief from a variety of aches and pains. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that works by reducing inflammation, while acetaminophen is a pain reliever and fever reducer that works by blocking pain signals in the brain. Together, these two ingredients provide powerful relief from headaches, backaches, menstrual cramps, and other types of pain.