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.
Bupropion is available as the brand-name drugs Wellbutrin SR, Wellbutrin XL, Aplenzin, Forfivo XL, and Zyban. Itâs also available as a generic drug. Generic drugs usually cost less than the brand-name version.