Call your doctor at once if you have a serious side effect such as: 1  headache with chest pain and severe dizziness, fast or pounding heartbeats, shortness of breath, fainting; 2  diarrhea that is watery or bloody;  fever, swollen glands, body aches, flu symptoms, new or worsening cough;
The maximum daily doses is also slightly different as both Wellbutrin XL and Wellbutrin have a maximum daily dose of 450 mg per day, whereas the maximum dosage for Wellbutrin SR is only 400 mg per day.
Try Wellbutrin SR, 150mg, B.I.D. (twice a day). It's neither an SSRI or an SNRI (Effexor), and pharmacologically different. Relatively free of systemic side effects, this antidepressant is both well-tolerated and effective. I used to take it, but it lost it's efficacy after a while.