Stopping Wellbutrin (bupropion) suddenly can trigger a range of withdrawal symptoms, from irritability and fatigue to headaches and increased appetite. Most of these symptoms appear within a few days of your last dose and typically resolve on their own within about 10 days, but the bigger risk is a return of the depression or anxiety that Wellbutrin was treating in the first place. A gradual taper is the safest way to stop.
Common Withdrawal Symptoms
Bupropion works by influencing dopamine and norepinephrine activity in your brain. When you stop abruptly, your brain needs time to adjust to functioning without that chemical support. During that adjustment window, you can experience:
- Anxiety or irritability
- Fatigue
- Increased appetite
- Trouble sleeping
- Headaches
- Body aches or muscle pain
These symptoms tend to come on fast, often within one to three days of missing your medication. Bupropion and its main active byproduct both have an average half-life of about 20 to 21 hours, meaning roughly half the drug leaves your system each day. After two or three days without a dose, levels drop low enough for your body to notice.
Rare but Intense Reactions
Most people experience mild to moderate symptoms, but a small number of people report more severe reactions. In documented cases, one person developed involuntary muscle movements after abruptly stopping bupropion. Another described an overwhelming crawling sensation under her skin. These reactions are uncommon, but they illustrate why stopping cold turkey carries unpredictable risks, especially at higher doses or after long-term use.
Withdrawal vs. Depression Coming Back
One of the trickiest parts of stopping Wellbutrin is figuring out whether what you’re feeling is a temporary withdrawal reaction or your original condition returning. The distinction matters because the two require very different responses.
Discontinuation symptoms appear suddenly, often within days of your last dose, and tend to resolve within about 10 days. They also include physical symptoms that aren’t typical of depression, like dizziness, body aches, and unusual skin sensations. A depressive relapse, by contrast, builds more gradually, worsens over time, and persists. A formal diagnosis of a major depressive episode requires symptoms lasting at least two weeks.
If your low mood, fatigue, or anxiety keeps getting worse after the first week or two off the medication rather than improving, that’s a signal your underlying condition may be resurfacing rather than a temporary withdrawal effect.
The Relapse Numbers
Returning depression is a real and common outcome when stopping antidepressants. A trial following 478 patients across 150 general practices in England found that 56% of people who discontinued long-term antidepressant use experienced a new depressive episode within a year. Among those who stayed on their medication, the relapse rate was 39%. By the end of the year, about 4 in 10 people who had stopped their antidepressant ended up going back on one.
That said, 44% of those who stopped did not relapse after a full year. Discontinuation isn’t guaranteed to end badly, but the odds of a depressive episode roughly double compared to staying on treatment. The longer you’ve been on Wellbutrin, and the more depressive episodes you’ve had in your life, the higher your individual risk tends to be.
Mood Changes and Suicidal Thoughts
There is a small but documented body of evidence that abruptly stopping an antidepressant can trigger new or worsening suicidal thoughts in some people, even in individuals who have never experienced suicidality before. Most of the reported cases involve other classes of antidepressants (particularly SNRIs like venlafaxine), and the data for bupropion specifically is limited. Still, the pattern is worth knowing about: sudden emotional deterioration in the days following abrupt discontinuation that resolves when the medication is restarted.
If you or someone around you notices a sharp, unexpected shift toward hopelessness or suicidal thinking shortly after stopping Wellbutrin, that warrants immediate medical attention. It may be a withdrawal-related reaction, not a reflection of your baseline mental state.
Why Tapering Is Safer
Gradually reducing your dose gives your brain time to recalibrate. A typical taper involves stepping down to a lower dose for a period of weeks before stopping entirely, though the exact schedule depends on your current dose, how long you’ve been taking it, and how you respond to each reduction. There is no single taper protocol that fits everyone.
What a taper does practically is spread the adjustment period out so your brain chemistry shifts slowly rather than all at once. This reduces both the intensity of withdrawal symptoms and the likelihood of a sudden mood crash. If symptoms do appear during a taper, your prescriber can slow down the schedule or hold at a given dose longer before making the next cut.
If you’ve already stopped abruptly and are experiencing significant symptoms, restarting the medication and then tapering under guidance is a common and reasonable approach. The withdrawal symptoms associated with bupropion generally respond quickly to reintroduction of the drug.
What to Expect if You’ve Already Stopped
If you missed several doses or stopped on your own and are now feeling the effects, here’s a practical framework. Physical symptoms like headaches, fatigue, and body aches typically peak within the first few days and fade over a week to 10 days. Mood-related symptoms can be harder to read because they overlap with the condition Wellbutrin was treating.
Track how you feel day by day. Withdrawal symptoms improve with time. Depression gets worse. If you’re feeling progressively better after the first rough week, your body is likely adjusting. If you’re feeling progressively worse, particularly after the two-week mark, the medication was likely doing more for you than you realized, and resuming treatment is worth discussing with whoever prescribed it.