The active ingredient (which makes this medicine work) is ibuprofen which is a non-steroidal-anti- inflammatory (NSAID) painkiller. Nurofen for Children 100mg chewable capsules are used in children from 7 to 12 years for the relief of mild to moderate pain such as a sore throat, dental pain, ear ache, headache, minor aches and sprains, and symptoms of cold and flu. Ibuprofen also brings down a high temperature (fever). You must talk to a doctor if your child does not feel better or if your child feels worse after 3 days.