I was prescribed Wellbutrin by my Ob/Gyn for S.A.D. (Seasonal Aff...

I was prescribed Wellbutrin by my Ob/Gyn for S.A.D. (Seasonal Affective Disorder). The actual prescription allowed for generic and I started out taking 150mg of Bupropion a day. I felt like this was too much as during the day I was fine, but at night I would get very jittery and almost manic. So I called to find out about cutting it down to 75 mg, just once a day instead of twice. I was fine but noticed in the last few days my neck and chin started itching really badly. Yesterday I made the connection that the hives appeared approximately one to two hours after I took my one dose. I took my meds at around 1:00 p.m. and by 5:30 I noticed fairly predominant hives on my neck and chin. I treated it with hydrocortisone cream and it went away. Today I did not take any meds at all and I have no hives or itching of any kind. I am sure it is from the meds because absolutely nothing else has changed in my life (soap, foods, etc.). If there is anything else that gives the same desired results for S.A.D. but without all the crazy side effects please let me know so I can ask my doctor. Thanks.