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.
Unlike Wellbutrin SR and Wellbutrin XL, Wellbutrin has a short half life and is typically administered three to four times per day. Common side effects of Wellbutrin include dry mouth, loss of appetite, headache, nausea, weight loss, dizziness, constipation and sweating. Wellbutrin must be administered every day for four to six weeks before the full therapeutic effect is present. Fat contains 3,500 calories per pound.