Deb,
I would not recommend you to use an ehinacea. It' s kind of allergic. Also I recommend you to use some cleansing technique and diet described on this website (especially I like the diet recommended by Gubi on the Cancer Forum . My diet is the same).
You know , Deb, the remedy for cure asthma is exists. Not so popular. Because this is the recent discovery. Asthma is treated excellent! As well as lung cancer and other lung diseases. Please contact me.