If you’re considering an antidepressant, or struggling with side effects on your current one, bupropion may come up. It works differently from the most common antidepressants, the SSRIs and SNRIs, and its side effect profile is distinct, which makes it a good fit for some people and a poor fit for others. This guide explains how bupropion works, its benefits and risks, how it compares with SSRIs, and who it tends to suit.
What Is Bupropion?
Bupropion is an antidepressant that works mainly by affecting dopamine and norepinephrine, two brain chemicals involved in motivation, energy, and attention. It’s sold as Wellbutrin and other brands in immediate-release, sustained-release, and extended-release forms. It’s used for depression, seasonal affective disorder, and smoking cessation, and sometimes alongside other antidepressants.
Because it doesn’t act mainly on serotonin, its side effects differ from those of SSRIs. Many people find it energizing rather than sedating, which can be helpful for low energy and motivation but may worsen anxiety or insomnia in some.
| Feature | Bupropion |
|---|---|
| How it works | Dopamine and norepinephrine |
| Weight | Least weight gain in a 2024 study of eight antidepressants |
| Sexual side effects | Generally fewer than SSRIs |
| Main risk | Dose-related seizure risk |
| Avoid if | Seizure disorder, bulimia or anorexia, abrupt alcohol or sedative withdrawal |
Bupropion and Weight
Bupropion and weight have a favorable relationship: in a large 2024 study of more than 183,000 adults starting common antidepressants, bupropion was linked to the least weight gain. As summarized by Harvard Health Publishing, average gain at two years was about 1.2 pounds with bupropion, compared with about 3.2 pounds with sertraline and 3.6 pounds with escitalopram.
Average weight gain two years after starting each antidepressant.
That doesn’t mean bupropion causes weight loss for everyone, and weight alone shouldn’t decide the choice. But for people for whom weight gain has been a problem or a worry, it’s often worth discussing. Our guide to antidepressants and weight gain covers this in more detail.
Common Wellbutrin Side Effects
Common Wellbutrin side effects include insomnia, headache, dry mouth, nausea, agitation or restlessness, tremor, and a faster heart rate, and some people notice reduced appetite. Taking it in the morning can reduce sleep problems. Blood pressure should be checked before and during treatment.
Bupropion is also associated with less emotional blunting than some antidepressants. In a survey of 669 people taking antidepressants, 46% overall reported emotional blunting, compared with 33% of those taking bupropion. It’s also generally linked to fewer sexual side effects than SSRIs.
Share of survey respondents reporting emotional blunting.
Because bupropion can be activating, some people notice more anxiety or jitteriness in the first weeks. This often settles, but it’s worth reporting, especially if anxiety was already a concern. Adjusting the dose or timing can help.
Bupropion isn't stronger or weaker than an SSRI. It's different, and that difference is exactly why it suits some people so well.
Wondering if bupropion fits you?
A medication review can help. By telehealth across South Carolina and New York.
Bupropion Seizure Risk
Bupropion seizure risk is dose-related and low at standard doses: according to the Health Canada product monograph for sustained-release bupropion, the seizure incidence was about 0.1% at the recommended range of 100 to 300 mg per day, rising to about 0.4% at 400 mg per day. That’s why doses are increased gradually and maximum doses aren’t exceeded.
Bupropion isn’t used in people with a seizure disorder, current or past bulimia or anorexia, or those abruptly stopping alcohol, benzodiazepines, or similar drugs, all of which raise seizure risk. Tell your psychiatrist about head injuries, heavy drinking, and all medications, including other products that contain bupropion.
Bupropion also comes in several formulations, and the same medication appears in products used for smoking cessation. Taking two bupropion products at once raises seizure risk, so tell every prescriber and pharmacist about all your medications.
Bupropion vs SSRI
The main differences in bupropion vs SSRI are how they work and their side effects: SSRIs act on serotonin and often help anxiety, while bupropion acts on dopamine and norepinephrine, tends to be more energizing, and is linked to less weight gain and fewer sexual side effects. Bupropion is generally less helpful for anxiety disorders.
- Share your history. Tell your psychiatrist about seizures, eating disorders, head injuries, and alcohol use.
- Start low. Doses are increased gradually to limit side effects and seizure risk.
- Take it in the morning. Morning dosing can reduce insomnia.
- Check blood pressure. Monitor before and during treatment.
- Report side effects. Tell your psychiatrist about agitation, sleep problems, or mood changes.
Like other antidepressants, bupropion usually takes several weeks to show its full effect. Early changes in energy may come first, with mood improving more gradually. Regular follow-up helps decide whether the dose is right.
Bupropion is sometimes added to an SSRI to boost response or counter sexual side effects. Our guides to SSRIs vs SNRIs and antidepressant side effects cover the alternatives.
Side effects getting in the way
Weight gain, sexual side effects, or feeling flat on another antidepressant.
A different mechanism
A careful look at whether bupropion fits your symptoms and health history.
Relief with fewer trade-offs
Improved mood and energy with side effects you can live with.
Dr. Gabriella Farkas, MD PhD
Board-certified adult psychiatrist with a PhD in neuroscience and pharmaceutical research experience. Dr. Farkas matches antidepressants to each patient’s symptoms and side effect priorities.
About Dr. Farkas →Is Bupropion Right for You?
Bupropion may be right for you if depression comes with low energy and motivation, if weight gain or sexual side effects have been a problem on other antidepressants, or if you’re also trying to quit smoking. It may be less suitable if anxiety or insomnia is prominent, or if you have seizure risk factors.
A comprehensive medication review can weigh these factors. Don’t stop bupropion or any antidepressant suddenly without guidance. Our guide to seasonal affective disorder mentions its seasonal use. If you’re having thoughts of suicide, call or text 988 in the US.
Key Terms
- Bupropion
- An antidepressant that acts on dopamine and norepinephrine.
- Norepinephrine
- A brain chemical involved in alertness, energy, and attention.
- Seizure threshold
- How easily the brain can have a seizure; some medications lower it.
- Extended-release
- A formulation that releases medication gradually.
Common Questions About Bupropion
What is bupropion used for?
Bupropion is used to treat depression, seasonal affective disorder, and smoking cessation, and it's sometimes added to other antidepressants. It works on dopamine and norepinephrine. It tends to be energizing. It's linked to less weight gain. Your psychiatrist can explain whether it fits. Your psychiatrist can help decide. Monitoring keeps treatment safe.
Does bupropion cause weight gain?
Bupropion was linked to the least weight gain among eight common antidepressants in a 2024 study of more than 183,000 adults, with about 1.2 pounds on average at two years. Some people lose weight. Others gain a little. Individual responses vary. Weight is monitored. Your psychiatrist can help decide. Monitoring keeps treatment safe.
What are common Wellbutrin side effects?
Common Wellbutrin side effects include insomnia, headache, dry mouth, nausea, restlessness, tremor, and a faster heart rate, and some people notice reduced appetite. Morning dosing can help sleep. Blood pressure should be monitored. Report side effects early. Most can be managed. Your psychiatrist can help decide. Monitoring keeps treatment safe. Plans can be adjusted.
Can bupropion cause seizures?
Bupropion can cause seizures, but the risk is low at standard doses, about 0.1% at 100 to 300 mg per day for the sustained-release form, and it rises with higher doses. Gradual increases lower risk. It's avoided with seizure disorders and eating disorders. Don't exceed prescribed doses. Tell your psychiatrist about risk factors.
Is bupropion better than an SSRI?
Bupropion isn't better or worse than an SSRI; it's different, acting on dopamine and norepinephrine with less weight gain and fewer sexual side effects, but it's generally less helpful for anxiety. The best choice depends on your symptoms. Side effect priorities matter. Some people take both. Your psychiatrist can advise. Your psychiatrist can help decide.
Who should not take bupropion?
People with a seizure disorder, current or past bulimia or anorexia, or who are abruptly stopping alcohol, benzodiazepines, or similar drugs generally shouldn't take bupropion. Head injury history matters. Some medications interact. Tell your psychiatrist everything. Safer alternatives exist. Your psychiatrist can help decide. Monitoring keeps treatment safe. Plans can be adjusted.
Can bupropion be prescribed by telehealth?
Yes, Dr. Farkas can evaluate and prescribe bupropion when appropriate by secure telehealth for adults in South Carolina and New York. Bring your medication list. Blood pressure can be checked locally. You'll need a private space. Follow-ups use the same platform. Your psychiatrist can help decide. Monitoring keeps treatment safe. Plans can be adjusted.
The right antidepressant fits your priorities.
A careful, personalized medication review.
Sources
- Health Canada. “Bupropion hydrochloride sustained-release tablets: product monograph.” Drug Product Database, Health Canada. https://pdf.hres.ca/dpd_pm/00018678.PDF
- Harvard Health Publishing. “Weighing in on weight gain from antidepressants.” Harvard Health Blog, August 2024. https://www.health.harvard.edu/blog/weighing-in-on-weight-gain-from-antidepressants-202408023063
- Goodwin GM, Price J, De Bodinat C, Laredo J. “Emotional blunting with antidepressant treatments: a survey among depressed patients.” Journal of Affective Disorders, 2017;221:31–35. https://www.sciencedirect.com/science/article/abs/pii/S0165032717308303
Educational content only. This article does not constitute medical advice and does not establish a doctor-patient relationship. If you are in crisis, call or text 988 (Suicide & Crisis Lifeline) or call 911. Treatment decisions should be made with a qualified clinician familiar with your circumstances. Last reviewed: September 2026.