Weaning off Wellbutrin (bupropion) typically involves stepping down to a lower dose before stopping completely. The FDA’s prescribing information is straightforward: if you’re taking 300 mg per day, reduce to 150 mg once daily before discontinuing. Unlike some antidepressants notorious for harsh withdrawal, bupropion’s discontinuation symptoms tend to be mild and short-lived for most people.
What a Typical Taper Looks Like
The FDA label for Wellbutrin XL specifically states that patients on 300 mg should step down to 150 mg once daily before stopping. It does not specify exactly how long to stay at 150 mg before full discontinuation, which means your prescriber will tailor that window based on how long you’ve been on the medication, your dose, and how you respond to the reduction.
In practice, many providers keep patients at the lower dose for one to two weeks before stopping entirely. If you’ve been on Wellbutrin for a long time or at higher doses, your taper may be more gradual. Some prescribers add an intermediate step, such as going from 300 mg to 150 mg for two weeks, then to 150 mg every other day for another week, though this isn’t universally necessary.
If you’re on 150 mg and that’s your only dose, your prescriber may still recommend a brief taper period or simply have you stop, depending on your history. There’s no single right answer here, and the timeline should be a conversation with whoever prescribed the medication.
Why You Can’t Just Cut Tablets in Half
This is an important safety detail. Wellbutrin SR (sustained-release) and Wellbutrin XL (extended-release) tablets must be swallowed whole. Cutting, crushing, or chewing them destroys the coating that controls how the drug enters your bloodstream. Without that coating, the full dose hits your system at once, which increases the risk of seizures and other serious side effects.
This means you can’t DIY a taper by splitting a 150 mg extended-release tablet into 75 mg halves. If you need a dose that isn’t available in your current formulation, your prescriber can switch you to a different formulation or strength. Immediate-release Wellbutrin (not SR or XL) is available in smaller doses and can sometimes be used for more gradual tapering.
What Withdrawal Feels Like
Bupropion has a reputation for being gentler to stop than many other antidepressants, particularly SSRIs and SNRIs. When withdrawal symptoms do appear, they’re usually mild and tend to fade within a few days. The most commonly reported symptoms include:
- Anxiety or irritability
- Fatigue
- Increased appetite
- Trouble sleeping
- Headaches
- Muscle aches or general body pain
Bupropion itself has a half-life of about 21 hours, meaning half the drug clears your body roughly every day. But it produces active byproducts that linger longer, with half-lives stretching to 33 and 37 hours. Because of this variable clearance, withdrawal symptoms may not show up until two or three days after your last dose. Don’t assume you’re in the clear just because you feel fine on day one.
Severe reactions are rare but documented. Case reports describe involuntary muscle movements in one patient and an intense skin-crawling sensation in another, both after abrupt discontinuation rather than a gradual taper. This is part of why tapering matters even for a drug considered relatively easy to stop.
Managing Symptoms During the Taper
Most people won’t need to do much beyond waiting it out, since symptoms are generally mild and brief. That said, a few practical adjustments can help during the transition.
If fatigue is your main issue, protect your sleep schedule. Going to bed and waking up at consistent times gives your body the best chance to regulate as the medication leaves your system. Headaches and body aches typically respond well to over-the-counter pain relief. Increased appetite is common because bupropion suppresses appetite for many people, so what you’re feeling may simply be your baseline hunger returning. Knowing that can make it less alarming.
For anxiety or irritability, regular physical activity helps. Even moderate exercise like a 30-minute walk can take the edge off mood disruption during the adjustment period. If you’re having significant trouble sleeping, avoid caffeine after noon and keep screens out of the bedroom, the usual sleep hygiene basics that matter more when your brain chemistry is recalibrating.
How Long the Process Takes
From the day you start reducing your dose to the day you’re fully off the medication, most tapers run two to four weeks. A straightforward taper for someone on 300 mg XL might look like two weeks at 150 mg followed by discontinuation. Someone who has been on the medication for years or who is particularly sensitive to medication changes may taper over a longer period.
Once you stop completely, any lingering withdrawal symptoms typically resolve within one to two weeks. The active byproducts of bupropion take roughly a week to fully clear your body, which is why symptoms can persist for several days after your last pill.
What to Watch For After Stopping
The trickiest part of stopping any antidepressant is distinguishing withdrawal symptoms from the return of the condition the medication was treating. Irritability and anxiety can be withdrawal effects, but they can also signal that your depression or anxiety is coming back. The key difference is timing: withdrawal symptoms appear within days and resolve within a couple of weeks, while a relapse tends to develop more gradually over weeks to months and doesn’t improve on its own.
If you notice your mood worsening steadily three or four weeks after discontinuation, that’s worth flagging with your prescriber. It doesn’t necessarily mean you need to go back on the medication, but it’s important information for deciding next steps. The FDA labeling specifically notes that clinicians should consider changes to the treatment plan when depression worsens or new psychiatric symptoms emerge.