Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID), which relieves pain and swelling (inflammation). It is used to treat headaches, muscle aches, backaches, dental pain, menstrual cramps, arthritis, or athletic injuries. Ibuprofen Child is also used to reduce fever and to relieve minor aches and pain due to the common cold or flu. Ibuprofen Child works by blocking the enzyme in your body that makes prostaglandins. Decreasing prostaglandins helps to reduce pain, swelling, and fever. Do not give Ibuprofen Child to a child younger than 2 years of age unless directed to do so by the doctor.