Ibuprofen, the active substance in this medicine, works by reducing pain and fever. It is indicated in adults and adolescents over 12 years of age for symptomatic relief from mild or moderate occasional pain, such as headache, dental, menstrual, muscle (contractures) or back (lumbago), as well as in febrile states. You should consult a doctor if it gets worse or does not improve, if the fever persists for more than 3 days or pain more than 3 days in adolescents or 5 days in adults.