Wellbutrin XL (bupropion) is an atypical antidepressant that works on dopamine and norepinephrine to treat major depression and seasonal affective disorder. Unlike typical antidepressants, it causes less weight gain and fewer sexual side effects while boosting energy and motivation. For patients seeking online medicine shopping options, working with licensed providers ensures proper monitoring for this once-daily extended-release medication requiring consistent medical supervision throughout treatment.