Does Wellbutrin Cause Weight Loss? What the Label Says

Among antidepressants, Wellbutrin (bupropion) stands out — it's one of the few linked more often with weight loss than weight gain. Its FDA label describes short-term depression trials in which bupropion patients were more likely than placebo patients to lose over 5 pounds — and less likely to gain weight. Still, bupropion by itself carries no FDA approval for weight loss. How it affects weight differs from one person to the next. And it isn't safe for everyone: anyone with a seizure disorder, or any history of bulimia or anorexia, must not take it. If weight matters to you, it's a conversation to have with your prescriber — never a reason to start, stop or switch a medication on your own.

What does the Wellbutrin label actually say about weight?

Wellbutrin is approved to treat depression, and it's usually prescribed as one part of a broader plan for depression treatment that can also include therapy and changes to sleep, movement and routine. That weight finding sits in the adverse-reactions section of the Wellbutrin XL label. In the short-term depression trials, more people on bupropion than on placebo lost over 5 pounds, and fewer gained weight.

Two things are worth sitting with before that fact does too much work. First, "more people lost weight" is a statement about groups, not a prediction about you. Plenty of people take bupropion and see no weight change at all, and some gain. Second, those trials were designed to measure depression, not weight, and they were short. A few weeks of data can't tell you what your weight will do over a year or two on the medication — that question comes up later in this article, with a source.

Why isn't Wellbutrin approved for weight loss on its own?

FDA approval is specific: a medication is approved for the condition it was studied and shown to help, at an acceptable level of risk, in that population. On its own, bupropion holds that approval for depression — and, sold as Zyban, for quitting smoking — but not for weight loss.

One bupropion-containing medication does carry a weight-management approval: Contrave, a combination of naltrexone and bupropion that got the FDA's nod in 2014. According to the Contrave label, it's used together with a reduced-calorie diet and more physical activity, in adults with obesity or in adults who are overweight and have at least one weight-related health condition. For teens: Contrave isn't approved for anyone under 18, and its label says it isn't recommended for children and teens.

So "Wellbutrin for weight loss" usually blurs two different questions. One is "might my weight change if I take bupropion for depression?" — a fair question, with trial data behind it. The other is "can I take bupropion to lose weight?" — and the honest answer is that bupropion alone isn't approved for that, and whether any bupropion-containing medication fits your situation is a decision for a prescriber who knows your full history.

Who should not take bupropion at all?

According to its label, bupropion must not be used by people who have a seizure disorder; people with current or prior bulimia or anorexia nervosa; people who have abruptly stopped alcohol, benzodiazepines, barbiturates or antiseizure medicines; or people taking an MAOI for a psychiatric condition, or who have taken one within the past 14 days. It also must not be started in someone being treated with linezolid or intravenous methylene blue.

The eating-disorder rule deserves its own plain sentence, because it sits uncomfortably close to the reason many people ask about this medication in the first place. Bupropion should not be used by people who have, or have ever had, bulimia or anorexia, because seizures were more common in those patients. Before starting it, tell your prescriber about any history of an eating disorder, even from years ago; it's a safety question, not a judgment.

And if that history is part of your present, not just your past, treatment exists for that too — our page on eating disorders explains what care can look like. If you're struggling with eating, food or body image, the ANAD Helpline offers free support at 1-888-375-7767; if you're in crisis, call or text 988.

Does Wellbutrin keep weight off over the long term?

A large 2024 study of U.S. adults' health records found that, over two years, bupropion was linked with less weight gain on average than the other common antidepressants studied. On its own, bupropion lacks FDA approval for weight loss — and its effect on weight varies.

That's the most useful way to think about bupropion and weight: not as a medication that makes people lose weight, but as one that, on average, is associated with less gain than many alternatives. Weight is also only one factor your prescriber weighs. How well a medication actually treats your depression or your anxiety matters more than its weight profile, and antidepressants are used differently — and more cautiously — when someone has bipolar disorder. If you want the wider picture across medication classes, we've written separately about why some psychiatric medications cause weight gain.

Does Wellbutrin cause weight gain?

In the label's short-term trials, fewer people gained weight on bupropion than on placebo — so the trial data point the other way. One source of confusion is worth clearing up: the bupropion Medication Guide lists "weight gain" among the symptoms some people have when they stop smoking. That entry describes nicotine withdrawal — bupropion is also used to help people quit — not an effect of the drug itself.

None of that means you can't gain weight while taking bupropion. Appetite returning as depression lifts, changes in sleep and activity, other medications and ordinary life can all move the scale. If your weight changes in a way that bothers you, tell your prescriber what you're seeing — don't assume the medication is the cause, and don't stop taking it to find out.

What about teens?

MindVibe sees patients 13 and up, so this comes up often, and it deserves a plain answer. For teens: Wellbutrin (bupropion) isn't FDA-approved for anyone under 18; its label says safety and effectiveness in children and teens haven't been established.

That doesn't mean a teen will never be prescribed it. Prescribers can use a medicine "off-label" (for an age or condition that isn't on its FDA label) when they judge it's medically appropriate. If your teen is prescribed a medicine this way, it's reasonable to ask why it was chosen, what the evidence shows and what other options there are. Off-label prescribing is common in psychiatry — bupropion itself is sometimes prescribed off-label for conditions beyond depression, including ADHD.

What safety warnings should every patient know?

Wellbutrin (bupropion) and other antidepressant medicines may increase suicidal thoughts or actions in some children, teenagers and young adults (24 years of age and younger), especially within the first few months of treatment or when the dose is changed. Watch closely for new or sudden changes in mood, behavior, thoughts or feelings, and call your prescriber right away if you notice them.

If you or someone you know is thinking about suicide or is in crisis, call or text 988, or chat at 988lifeline.org, to reach the 988 Suicide & Crisis Lifeline. It's free, confidential and available 24/7. If someone is in immediate danger, call 911.

What should you do if weight is part of your medication decision?

Say so, out loud, at your next appointment. Weight change — gained, lost or feared — is one of the most common reasons people quietly stop taking an antidepressant, and quietly stopping is the one move that helps no one: stopping some medicines abruptly carries its own risks, and your prescriber can't solve a problem they don't know about. Useful questions to bring: Is my weight change likely related to this medication? What would we watch for, and over what time frame? If it continues, what are my options?

Never stop, start or switch a medication on your own; talk with your prescriber. If you don't have one, or you want a second perspective on whether your current medication is the right fit, our psychiatric providers can talk it through with you — you can review our self-pay rates and the insurance we accept and book a first appointment when you're ready.

Frequently asked questions

Will I lose weight if I take Wellbutrin?

Maybe, maybe not. In the short-term depression trials on its FDA label, more people taking bupropion lost more than 5 pounds than people taking placebo, and fewer gained — but those are group results, not a forecast for you. Many people see no change, and no one can promise you a particular outcome. If weight is important to you, say so before starting, so you and your prescriber know what you're both watching for.

Can I ask my prescriber for Wellbutrin just to lose weight?

You can always raise weight as a concern — that's a legitimate part of choosing a medication. But bupropion alone isn't FDA-approved for weight loss, so a prescriber who agrees it fits your situation is making a broader judgment about your health, not filling a weight-loss request. The FDA-approved weight-management medication that contains bupropion is Contrave, which combines it with naltrexone and is used alongside a reduced-calorie diet and more physical activity.

Is Contrave the same thing as Wellbutrin?

No. Wellbutrin is bupropion alone, approved for depression. Contrave combines naltrexone and bupropion and was approved in 2014 for chronic weight management in adults with obesity, or adults who are overweight with at least one weight-related health condition — always alongside diet and activity changes. They differ in ingredients, approved uses and the population they were studied in; neither is simply a substitute for the other.

I had an eating disorder years ago. Can I still take Wellbutrin?

No — the label says bupropion must not be used by people with current or prior bulimia or anorexia nervosa, because seizures were more common in those patients. "Prior" includes a history from years ago, even one you consider fully behind you. Tell your prescriber; it's a safety question, not a judgment, and there are other antidepressants to consider.

Does Wellbutrin cause weight gain?

The trial data on its label point the other way: fewer people gained weight on bupropion than on placebo in short-term depression studies. The "weight gain" you may have seen in the bupropion Medication Guide refers to nicotine withdrawal — a symptom of quitting smoking, which bupropion is also used for — not an effect of the drug. That said, individual experiences vary, and weight can shift for many reasons during treatment.

I've gained weight on my current antidepressant. Should I switch to Wellbutrin?

Don't decide that alone, and don't stop your current medication to find out. Whether bupropion makes sense depends on your diagnosis, your health history — including anything that raises seizure risk — and how well your current medication is actually working. Bring the weight change to your prescriber as a problem to solve together; switching is one option among several.

Can my teenager take Wellbutrin?

Wellbutrin isn't FDA-approved for anyone under 18; its label says safety and effectiveness in children and teens haven't been established. A prescriber can still choose it off-label if they judge it medically appropriate, and if that happens it's reasonable to ask why it was chosen, what the evidence shows and what the alternatives are. Contrave, the weight-management combination, is likewise not approved or recommended for anyone under 18.

This article is for educational purposes only and is not medical advice. It doesn't replace a conversation with your own prescriber, who knows your history. Never start, stop or change a medication without talking with them first.