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.
1 Do not confuse Wellbutrin SR with Wellbutrin XL. 2  Do not confuse Zyban with Diovan. 3  Do not administer bupropion (Wellbutrin) with Zyban, which contain the same ingredients. 4  Administer doses in equally spaced time increments during the day to minimize the risk of seizures.