Medication Guide
Wellbutrin (Bupropion): Uses, Side Effects & What to Expect
Bupropion — sold as Wellbutrin — is an antidepressant that works differently from SSRIs. It’s an NDRI(acting on norepinephrine and dopamine) used for depression and seasonal affective disorder, and it’s often chosen because it’s less likely to cause sexual side effects or weight gain. It tends to be energizing rather than sedating.
Clinically reviewed by the Lyte Psychiatry Clinical Team · Last reviewed June 2026
What is bupropion?
Bupropion is a norepinephrine-dopamine reuptake inhibitor, or NDRI. Instead of acting mainly on serotonin the way SSRIs do, it increases two other chemical messengers — norepinephrine and dopamine — which are linked to energy, focus, and motivation. It’s sold as Wellbutrin (and as Zyban for quitting smoking), and is available generically.
What does Wellbutrin treat?
Bupropion is FDA-approved for major depressive disorder and seasonal affective disorder, and (as Zyban) for smoking cessation. Because of how it works, prescribers sometimes choose it when low energy or motivation is prominent, or add it to an SSRI to offset sexual side effects.
How is it different from an SSRI?
The main difference is the target: SSRIs raise serotonin, while bupropion raises norepinephrine and dopamine. In practice that means bupropion is less likely to cause sexual side effects or weight gain, and is usually more activating than sedating — so it’s often taken earlier in the day. It may be less helpful when anxiety is the main concern, which is something to weigh with your prescriber.
Common side effects
Most side effects are mild and often settle with time. The most commonly reported include:
- Dry mouth
- Nausea
- Trouble sleeping (especially if taken late in the day)
- Headache
- Anxiety, jitteriness, or tremor
- Increased sweating
Bupropion can also raise blood pressure in some people, so your prescriber may keep an eye on it.
Important safety notes
Bupropion carries a small, dose-related risk of seizures. That risk is kept low by using the lowest effective dose, increasing slowly, and staying within recommended limits — and it’s generally avoided in people with a seizure disorder or an eating disorder, which your prescriber will screen for.
Like all antidepressants, it also carries an FDA “boxed warning”: in people under 25, antidepressants can in rare cases increase suicidal thoughts, especially early in treatment. If you or someone you love has thoughts of self-harm, call or text 988 (the Suicide & Crisis Lifeline) right away, and tell your prescriber about any new or worsening mood changes.
A note on dosing
Dosing is individualized by your prescriber based on your diagnosis, the specific formulation (such as SR or XL), other medications, and your response. This page intentionally doesn’t give a specific number — the goal is the lowest effective dose, adjusted with your clinician.
Frequently asked questions
What is Wellbutrin (bupropion) used for?
Bupropion (brand name Wellbutrin) is an antidepressant FDA-approved for major depressive disorder and seasonal affective disorder. Under the brand name Zyban it is also approved to help with smoking cessation. Unlike SSRIs, it works on norepinephrine and dopamine rather than serotonin.
Is Wellbutrin an SSRI?
No. Bupropion is an NDRI — a norepinephrine-dopamine reuptake inhibitor. Because it does not act mainly on serotonin, it is less likely than SSRIs to cause sexual side effects or weight gain, which is one reason clinicians sometimes choose it.
What are the common side effects of bupropion?
Common side effects include dry mouth, nausea, trouble sleeping, headache, anxiety or jitteriness, tremor, and increased sweating. It can also raise blood pressure in some people. It tends to be more activating than sedating, so many prescribers dose it earlier in the day.
Does Wellbutrin cause weight gain or sexual side effects?
Bupropion is notable for being less likely than SSRIs to cause weight gain or sexual side effects, and it is sometimes added alongside an SSRI for that reason. Individual responses vary, so discuss your priorities with your prescriber.
What is the seizure risk with bupropion?
Bupropion carries a small, dose-related risk of seizures. The risk is minimized by using the lowest effective dose, increasing slowly, and staying within recommended limits. It is generally avoided in people with a seizure disorder or an eating disorder. Your prescriber screens for these before prescribing.
How do I stop taking bupropion safely?
Stop with your prescriber's guidance. While bupropion tends to cause fewer discontinuation symptoms than some antidepressants, it is still best to taper rather than stop abruptly, and to do so as part of a plan.
Related pages
This page is for general education and is not medical advice or a substitute for care from your own clinician. Medication decisions should always be made with a licensed prescriber who knows your history.
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