Wellbutrin XL side effects may include: Abdominal Pain, Agitation, Chest pain, Constipation, Diarrhea, Dizziness, Dry Mouth, Flushing, Insomnia, Migraine, Migraine, Nausea, Nausea, Palpitation, Rash, Tremor Not everyone who takes Wellbutrin XL experiences every side effects, and most people only experience one or two. Speak with your doctor for a full list of possible side effects. Dr. Sheehy (BSc Molecular Biology, PharmD) works a clinical pharmacist specializing in cardiology, oncology, and ambulatory care. He’s a board-certified pharmacotherapy specialist (BCPS), and his experience working one-on-one with patients to fine tune their medication and therapy plans for optimal results makes him a valuable subject matter expert for our pharmacy.Read More....