What Are Side Effects Of Long Term Use Of Foracort And Levolin?

Hello Sir, I am Ashok and I wanted to know something about my Son, His age is 5 yrs and he is staying in India. He used to take two Inhalers Foracort/Levolin as per Doctor suggestion whenever he has cold/cough problem.As doctor told us that once my son will be more older, then his body em-unity will be good and he will leave these inhalers. But still I am not sure about this inhalers whether any side effect or not and how long he will take this. Please suggest me. Thank you for you help in advance!!