Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever. It works by blocking the production of certain chemicals in the body that cause inflammation and pain. Ibuprofen is available over-the-counter in various forms, including tablets, capsules, and liquid. This medication is often used to treat conditions such as headaches, toothaches, menstrual cramps, and arthritis. While generally safe when used as directed, it is important to follow dosage instructions and consult a healthcare professional if you have any underlying health conditions or are taking other medications.