It is an association of acetaminophen, an active substance that is effective in reducing pain and fever, and acetylcysteine, an active substance that belongs to so-called mucolytics that act by decreasing the viscosity of mucous secretions, fluidizing them and facilitating their elimination. It is indicated for symptomatic relief in colds and influenza processes that occur with or without fever, mild or moderate pain and thick mucous secretions, in adults and adolescents over 12 years of age.
You should see a doctor if it gets worse or if it does not improve after 5 days or if the fever, if it exists, is maintained after 3 days.