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 Wellbutrin SR (bupropion SR) or Budeprion SRÂ®, usually taken twice a day. 2  Wellbutrin XL, Forfivoâ¢ XL, or Budeprion XLÂ® (bupropion XL), taken once a day. 3  Aplenzinâ¢ (bupropion hydrobromide), taken once a day.  ZybanÂ® (bupropion SR) or BuprobanÂ®, used for smoking cessation (taken twice a day).