I'm having asthma since childhood and i'm allergic to dust.I'm 22 years old and have been taking symkast L from the past 8 years.It gives a very long and heavy hangover due to which i'm always tired if i wake up early feeling drowsy the whole day.If I forget to take it anyday I get severe ashtmatic attacks in the middle of my sleep and whole body starts itching.Please suggest a convinient and better alternative ?