Wellbutrin, Anxiety & Asthma

I've been taking Wellbutrin XL for almost 3 yrs.  Previously I took Effexor XR for 5yrs.  I feel that the Wellbutrin has provided many positive results, however it does not help with anxiety and I have begun taking Xanax ER which has helped decrease anxiety, but it is still an issue.  My largest concern is that a few months after I started taking the Wellbutrin XL, my allergies increased significantly and I developed moderate to severe persistant asthma and take a ton of meds to try to control that. My quality of life has been greatly diminished, I was active in martial arts, enjoyed a lot of time in the outdoors and all of that is gone.  I am 43 yrs old.  I've recently been wondering if the Wellbutrin, since I've learned on this website that it increases adrenalin, is having an adverse reaction on my asthma?