From www.crazymeds.org:
What are Wellbutrin / Wellbutrin SR / Wellbutrin XL's FDA Approved Uses: Depression, Smoking Cessation (as Zyban)
What are Wellbutrin / Wellbutrin SR / Wellbutrin XL's Off-Label Uses: Weight Loss, Bipolar Depression, ADD/ADHD, Fibromyalgia, Arthritis, Chronic Fatigue, Multiple Sclerosis, Lupus, Headaches, Irritable Bowel Syndrome (IBS)
As you can read, Wellbutrin is not approved for panic attacks; in fact, anxiety and agitation are listed as possible side effects of Wellbutrin. Honestly, I'm not sure why a doctor would choose Wellbutrin for panic attacks, but you're going to need to ask him/her.
