What Is The Dosage Of Levolin?

My 14 yr old son uses levolin inhaler.He suffers mainly during winter.This time a new Dr. prescribed sereflo 125 inhaler 2 times twice a day for 2 months in addition to levoline. After 7 days levoline stopped as he breaths normal. Pick -flo meter reading has gone up from 240 to 400 which is his highest under normalcy. Now, we are confused whether we should discontinue sereflo.pl. advise.