Why does my child need inhaled corticosteroids?

Asthma experts believe that inhaled corticosteroids (ICS) are the best medicines for children with moderate to severe asthma. Also, some children with mild asthma may benefit from ICS.
 
Many studies have shown that ICS are by far the most effective medicines for controlling long-lasting asthma. ICS may prevent lung damage from untreated asthma. Children with asthma who use ICS have a better quality of life, fewer symptoms, better school attendance, and less need for long stays in the hospital. They also have less need for corticosteroids taken by mouth (like prednisone).