Hello, I Am Asthamatic Patient. Doctors Told Me That Its

Hello, i am asthamatic patient. Doctors told me that its impossile to compeletely get rif of it but we can control it. I was taking betnisol and T day tablet to control it. But recenrly and a doctor forbad me strictly to use betnisol daily. Now i am suffering from severe asthamatic attack freqently. I need inhaler just after 1-2 hours please precribe me any good and safe medicine to control it which is easily available in resonable price in pakistan