Nurofen is a brand of pain relief medication that contains the active ingredient ibuprofen. It is commonly used to alleviate mild to moderate pain, such as headaches, toothaches, and muscle aches, as well as to reduce fever and inflammation. Nurofen is available in various forms, including tablets, capsules, and liquid suspensions, making it suitable for both adults and children. Ibuprofen works by inhibiting enzymes that produce prostaglandins, which are chemicals in the body that promote inflammation and pain. While generally safe when used as directed, it is important to follow dosage instructions and consult a healthcare professional if symptoms persist or if there are any concerns about side effects.