Not to detract from meds but three reasons I would suggest additional water may help. My son has asthma and tells me it is helped greatly by the intake of extra water. Secondly, I have sleep apnea and tongue swelling which can be caused by dehydration and has been helped by drinking appropriate amounts of water for my weight. You hadn't said whether you are being treated for sleep apnea but if you have sleep apnea, which can be life-threatening and has many side-effects including heart disease, you should look into a sleep test. Also diamox is a diuretic so you may be becoming dehydrated if you are not consuming enough water.
As for I was using salbitamole (wrong spelling) and prednisoline but they worked well for me.and the other thing u should get rid of all the things which triggers your attack like flowers, pet, types of food, dust just anything.u won't see how effective your med is if u still have the collection of those things in your home.
it's terrible and destroying my brain and heart