Wellbutrin Withdrawal & Tapering Guide
bupropion
Boxed Warning
Suicidality risk in children, adolescents, and young adults under 25 during initial treatment.
In short
Wellbutrin (bupropion) is an NDRI with a half-life of 21 hours. Generally easier to taper than SSRIs/SNRIs. Withdrawal symptoms, when they occur, usually begin 1-3 days after dose reduction and settle within 1-2 weeks for most symptoms. It is also sold as Zyban, Aplenzin, Budeprion.
- Class
- NDRI
- Half-life
- 21 hours
- Common doses
- 75mg, 100mg, 150mg, 300mg
- Withdrawal onset
- 1-3 days after dose reduction
- Typical resolution
- 1-2 weeks for most symptoms
Educational reference only. Dose changes are decided with the prescriber who knows your history.
Overview
Bupropion is a norepinephrine-dopamine reuptake inhibitor (NDRI) approved for major depressive disorder, seasonal affective disorder, and smoking cessation (as Zyban). It is unique among antidepressants for its activating profile and lack of sexual side effects or weight gain.
75mg, 100mg, 150mg, 300mg
Immediate-release tablets: 75mg, 100mg; Sustained-release tablets (SR): 100mg, 150mg, 200mg; Extended-release tablets (XL): 150mg, 300mg
Category C (risk cannot be ruled out)
Mechanism of Action
Inhibits reuptake of norepinephrine and dopamine (NDRI). Does not significantly affect serotonin reuptake. The active metabolites hydroxybupropion, threohydrobupropion, and erythrohydrobupropion also contribute to pharmacological activity.
Taper Notes
Generally easier to taper than SSRIs/SNRIs. IR tablets can be split for gradual reduction.
Hyperbolic Tapering Guidance
Reduce gradually. IR formulation provides most flexibility for dose adjustments.
Summary written by TaperCommunity, informed by the Maudsley Deprescribing Guidelines (Horowitz & Taylor) and related literature — see Sources & References below. Not affiliated with or endorsed by the Maudsley.
Tapering Protocol
Evidence-based phased reduction schedule. Always taper under medical supervision.
| Phase | Duration | Notes |
|---|---|---|
| Initial reductions | 2-4 weeks | Use available XL strengths. Most tolerate initial steps well. |
| Formulation switch | 2-4 weeks | Your prescriber may switch to SR or IR formulation for more flexible adjustments. |
| Final reductions | 4-6 weeks | IR tablets offer the most flexibility. Bupropion withdrawal is generally milder than SSRI/SNRI discontinuation. |
Withdrawal Timeline
1-3 days after dose reduction
3-7 days
1-2 weeks for most symptoms
Fatigue and motivational deficits may linger 2-4 weeks. No serotonin-related symptoms (no brain zaps). Wellbutrin has one of the mildest withdrawal profiles among antidepressants.
Community Tips
Practical insights shared by members tapering Wellbutrin. Not medical advice — always consult your prescriber.
- 1Wellbutrin withdrawal is fundamentally different from SSRIs — no brain zaps, no serotonin discontinuation syndrome. The main issues are fatigue, low motivation, and mild mood dips.
- 2Ask your prescriber about IR tablets for the final phase — they offer more flexibility than XL or SR formulations.
- 3Do not crush or split XL or SR tablets — they are designed for extended release. Cutting them can increase seizure risk.
- 4Some members report increased appetite and mild weight gain when stopping Wellbutrin, which normalizes over several weeks.
Common Withdrawal Symptoms
Interactions & Safety
Drug Interactions
- MAOIs — contraindicated (hypertensive crisis)
- Potent CYP2D6 inhibitor; increases levels of TCAs, SSRIs (paroxetine, fluoxetine levels affected less), metoprolol, flecainide, and other CYP2D6 substrates
- CYP2B6 inhibitors (ticlopidine, clopidogrel) increase bupropion levels
Food Interactions
- Food does not significantly affect SR/XL absorption
- Avoid alcohol (lowers seizure threshold)
Contraindications
- Seizure disorder
- Current or prior bulimia or anorexia nervosa (increased seizure risk)
- MAOIs within 14 days
Toxicity
Dose-dependent seizure risk (contraindicated above 450mg/day). Hypertension. Lower toxicity in overdose than TCAs but seizures and cardiac conduction delays possible.
Pharmacokinetics
ADME Profile
Well absorbed after oral administration. Tmax ~2 hours (IR), ~3 hours (SR), ~5 hours (XL). Extensive first-pass metabolism; bioavailability ~5–20%. Food does not significantly affect absorption of SR/XL formulations.
~20 L/kg (estimated)
Extensively metabolized hepatically via CYP2B6 (primary) to the active metabolite hydroxybupropion. Non-CYP pathways produce threohydrobupropion and erythrohydrobupropion.
Renal (~87%, with <1% as unchanged bupropion) and fecal (~10%).
~84%
~200 L/hr (apparent oral clearance)
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Other Drug Profiles
The arithmetic of a proportional reduction
The Maudsley Deprescribing Guidelines and NICE NG222 describe reducing NDRI medications by a proportion of the previous dose rather than by a fixed amount, so each cut is smaller than the last. The table shows what that arithmetic produces at 10% per step, using 100 mg only as a worked example. How large each step is, how long it is held, and whether this pattern applies at all are decisions for the person and their prescriber.
| Step | % of starting dose | Worked example (100 mg start) |
|---|---|---|
| Start | 100% | 100 mg |
| Step 1 | 90% | 90 mg |
| Step 2 | 81% | 81 mg |
| Step 3 | 73% | 72.9 mg |
| Step 4 | 66% | 65.6 mg |
| Step 5 | 59% | 59 mg |
| Step 6 | 53% | 53.1 mg |
| Step 7 | 48% | 47.8 mg |
| Step 8 | 43% | 43 mg |
This is an illustration of a published method, not a schedule for anyone. It does not account for how long you have taken Wellbutrin, your current dose, formulation, or history. TaperCommunity does not recommend doses or dose changes; those are agreed with your prescriber.
Frequently asked questions about Wellbutrin
What are the withdrawal symptoms of Wellbutrin (bupropion)?
Common withdrawal symptoms of Wellbutrin (bupropion) include: fatigue, irritability, headache, insomnia, low mood. Symptom severity varies by individual, dose, and duration of use.
How should I taper off Wellbutrin (bupropion)?
Generally easier to taper than SSRIs/SNRIs. IR tablets can be split for gradual reduction. Reduce gradually. IR formulation provides most flexibility for dose adjustments.
How long does Wellbutrin withdrawal last?
Wellbutrin withdrawal typically begins 1-3 days after dose reduction, peaks around 3-7 days, and resolves within 1-2 weeks for most symptoms. Fatigue and motivational deficits may linger 2-4 weeks. No serotonin-related symptoms (no brain zaps). Wellbutrin has one of the mildest withdrawal profiles among antidepressants.
Can I stop Wellbutrin cold turkey?
Stopping Wellbutrin abruptly is not recommended. Its half-life is 21 hours, and the receptor adaptations built up during treatment do not reverse at that speed, so a sudden stop tends to produce the sharpest withdrawal. Prescribing guidance favours gradual, proportional reductions agreed with your prescriber.
How long does Wellbutrin stay in your system?
Wellbutrin (bupropion) has a half-life of 21 hours. A drug is mostly cleared after about five half-lives, so Wellbutrin is largely out of the body about 4 days after the last dose, longer in older adults or with liver or kidney impairment. Withdrawal symptoms often begin before the drug has fully cleared and continue after it has, because the adaptations the brain made during treatment reverse more slowly than the drug leaves the blood.
What tips do others have for tapering Wellbutrin?
Wellbutrin withdrawal is fundamentally different from SSRIs — no brain zaps, no serotonin discontinuation syndrome. The main issues are fatigue, low motivation, and mild mood dips. Ask your prescriber about IR tablets for the final phase — they offer more flexibility than XL or SR formulations. Do not crush or split XL or SR tablets — they are designed for extended release. Cutting them can increase seizure risk. Some members report increased appetite and mild weight gain when stopping Wellbutrin, which normalizes over several weeks.
Recent discussions about Wellbutrin
What members tapering Wellbutrin are asking and reporting right now. Personal experience, not medical advice.
- Wellbutrin Tapering ThreadThis is the forum for everyone tapering Wellbutrin. When you log a check-in in My Taper, it will appear here. That way you can see how others on the same medication are…Based · 8 months ago
- first reduction: (really) poor sleep and night time headachesThank you for the opportunity to ask a question. I hope it's not bad form to pose one right out of the gate - I can't read more than a few posts tonight and I'm hoping…Raphaela · yesterday
Sources & References
Wellbutrin (bupropion) information on this page is sourced from peer-reviewed research, regulatory bodies, clinical guidelines, and patient-advocacy organizations.
Encyclopedic & chemical databases
Neutral, high-authority entity references.
Regulatory sources
Official prescribing information and safety notices.
Peer-reviewed research
Primary literature cited in this taper guide.
- Davies J, Read J 2019 — Discontinuation symptoms after treatment with serotonergic and noradrenergic antidepressants — a systematic review (Addictive Behaviors)
- Horowitz MA, Taylor D 2019 — Tapering of SSRI treatment to mitigate withdrawal symptoms (hyperbolic taper framework) (The Lancet Psychiatry)
- Patel K, Allen S, Haque MN, et al. 2016 — Bupropion: a review of its use in the management of major depressive disorder (Therapeutic Advances in Psychopharmacology)
Clinical guidelines
Evidence-based deprescribing and prescribing standards.
Deprescribing-specific resources
Clinician-facing references on tapering protocols.
- Deprescribing.org — Evidence-based deprescribing algorithms for antidepressants
- Royal College of Psychiatrists — Stopping antidepressants — UK clinical guidance on antidepressant discontinuation
Patient-advocacy & lived-experience
Long-running communities documenting withdrawal experience.
- Surviving Antidepressants — Wellbutrin (bupropion) tapering forum — Community archive of Wellbutrin discontinuation experiences
- Mad in America — Wellbutrin archive — Journalism and personal narratives on bupropion
- Inner Compass Initiative — Withdrawal Project — Peer-led resources for psychiatric drug discontinuation
- RxISK — adverse drug reaction reporting — Independent database of patient-reported adverse effects
TaperCommunity does not provide medical advice. Always consult a qualified prescriber before adjusting psychiatric medication.