Bupropion

Bupropion is an antidepressant that works differently from the SSRIs most people have heard of. Rather than acting on serotonin, it affects dopamine and norepinephrine signaling, which is why its side-effect profile is different too — less sexual dysfunction, less sedation, and typically no weight gain.

It is approved under several names for several jobs. The Wellbutrin XL label indicates it for major depressive disorder and for prevention of seasonal affective disorder. Under the name Zyban it has been used for smoking cessation. And at 90 mg per tablet it is the larger half of Contrave, the weight-management combination with naltrexone.

For weight specifically, bupropion is a minor player on its own. What it reliably does is avoid the weight gain that many other antidepressants cause — a real advantage for someone who needs both mood treatment and weight management, and a common reason it gets chosen.

Two warnings dominate. The label carries a boxed warning for suicidal thoughts and behaviors, based on short-term trials showing increased risk in children, adolescents and young adults taking antidepressants; the same trials did not show increased risk in people aged 65 and older. And bupropion lowers the seizure threshold: in Contrave’s clinical trials the seizure incidence was about 0.1% versus 0% on placebo. Contrave is accordingly contraindicated in seizure disorder, in current or prior anorexia nervosa or bulimia, in uncontrolled hypertension, with chronic opioid use, and with other bupropion-containing products — a list that also flags who should be cautious with bupropion alone.

Worth asking your clinician: whether an existing antidepressant is working against your weight goal, whether bupropion would interact with anything you take, and whether your history includes any seizure risk. Our bupropion evidence review, GLP-1 plus bupropion page, and non-GLP-1 drug weight-effect lookup cover the interactions.