Advil is a brand name for the over-the-counter medication containing ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID). It is commonly used to relieve pain, reduce inflammation, and lower fever. People often take Advil for headaches, muscle aches, arthritis, menstrual cramps, and other minor aches and pains. Advil works by blocking the production of certain chemicals in the body that cause inflammation and pain. It is available in various forms, including tablets, capsules, and liquid gels. While generally safe for most people, it is important to follow the recommended dosage and consult a healthcare professional if you have any underlying health conditions.