Merlin ibuprofen suspension is a commonly used antipyretic and analgesic drug for children. Merlin has a good taste, which is easily accepted by most children, and can be applied when children have fever. The fever criterion for the application of Merlin in children is an axillary body temperature of 38.5°C or higher. Children may have headache, weakness, sore throat, or even muscle pain, and other symptoms, and the application of ibuprofen can play a good role in reducing fever at this time. Children with painful conditions, such as toothache as well as earache, can apply ibuprofen for symptomatic support treatment of pain.