Tolerance of Bupropion SR After Delayed-Onset Urticaria and Angioedema Associated With Bupropion XL.

Bupropion is an atypical antidepressant indicated for the treatment of major depressive disorder (MDD), seasonal affective disorder (SAD), and smoking cessation. It is also used off-label for attention deficit hyperactivity disorder (ADHD). Its mechanism of action includes the selective norepinephrine and dopamine reuptake inhibitor (NDRI). The drug is available in immediate-release (IR), sustained-release (SR), and extended-release (XL) formulations. Common side effects are typically mild and include anxiety, insomnia, headache, dizziness, constipation, and nausea. Rarely, cutaneous hypersensitivity reactions may occur. We describe a 23-year-old man who developed severe and diffuse urticaria and angioedema 4 weeks after initiation of bupropion XL for MDD and ADHD. The bupropion was stopped, and he was treated with levocetirizine, diphenhydramine (oral and topical), and methylprednisolone with complete resolution of his symptoms within 2 weeks. Due to a good initial therapeutic response to the medication, a trial of bupropion SR was initiated. The patient again had a favorable therapeutic response without any dermatologic side effects.