my 2 years old son had wheezing, only for 2 times, as a result of sever cold and cough. he has been prescribed with budocort 200 inhaler to use two times a day for one and half years, as a precaution. i'm tensed to use it as my son is only 2 years old, and has to use for the next one and half years. its a steroid right? it may cause side effect also? as he had wheezing only 2 times, is it advisable to use this inhaler?