How to taper Wellbutrin / Bupropion

Test Edit from Go2Zeros account by chippy 

The following post is an amalgamation of research and draws from a variety of sources. Clinical resources are subject to regular updates as scientific understanding improves. This post is for informational purposes, it is not a peer-reviewed, controlled clinical document and should NOT be taken as medical information nor clinical guidelines. Instead, it is provided for informational purposes and should serve as a useful prompt to do your own research, review appropriate clinical sources and seek qualified medical advice when making your own decisions.

Wellbutrin/Bupropion - what it is and how to taper as safely as possible

What is Wellbutrin?

Wellbutrin is a brand name for Bupropion. It is an antidepressant that primarily affects norepinephrine and dopamine and is classified as an NDRI (norepinephrine–dopamine reuptake inhibitor). It has no direct serotonergic mechanism.

Bupropion is prescribed for:

- Depression

- Seasonal affective disorder (SAD)

- Smoking cessation (e.g. Zyban)

- Sometimes for ADHD

Bupropion, due to its amphetamine-like chemical structure, may affect the results of some rapid urine (drug) tests, for example, a false positive result for amphetamines.

Bupropion is a CYPD26 inhibitor. This is very important to know. About 25% of all common medication is metabolized by the enzyme CYPD26. 

Using bupropion turns a normal metaboliser into a poor metaboliser. And a poor metaboliser will metabolise other medications even slower. Many antidepressants are metabolized by CYPD26. Which means that the effect of these drugs becomes much stronger. 

When lowering the dose of bupropion, the inhibiting slowly gets less. So, when tapering bupropion, this may speed up the metabolism of other meds!

For example: If one would use Paroxetine combined with Bupropion; Tapering the Bupropion alone, would speed up the metabolism of the Paroxetine. Given the effect as if one is tapering Bupropion AND the Paroxetine at the same time. Which may result in extra withdrawal symptoms.

“Wellbutrin is easy to taper” – is that true?

This is a persistent misconception.

It is seen that:

- Some people can taper bupropion with relatively few problems

- Others experience significant and sometimes prolonged withdrawal symptoms

Withdrawal symptoms may include:

- Anxiety, agitation, inner restlessness

- Migraines

- Insomnia or disrupted sleep

- Nausea

- Paraesthesia (burning or irritated skin)

- Eczema

- Tinnitus

- Depressive symptoms

- Cognitive problems (concentration, memory)

- Irritability, sometimes even aggression

- Emotional instability

- Physical symptoms such as headache, dizziness, and fatigue

- Pain in muscles and/or joint (Sharp)

- Suicidal ideation

Symptoms may also be delayed, emerging weeks or even months after a dose reduction or stopping. For this reason, bupropion should be approached with the same caution as other antidepressants:

Slow and gradual tapering is essential.

The different formulations: IR, SR, and XL (XR)

Bupropion is available in different release forms. These differences are crucial for tapering.

IR – Immediate Release

Short-acting

Usually taken multiple times per day

The most flexible formulation for tapering, as small dose reductions are easier

SR – Sustained Release

Intermediate duration

Usually taken once or twice daily

Less flexible than IR, but sometimes usable for tapering

XL / XR – Extended Release

Long-acting (designed for once-daily dosing)

In many countries, the only formulation available

The most difficult form to taper

Source: http://psychopharmacologyinstitute.com/antidepressants/bupropion-psychopharmacology

Core Principle: Slow, Stable, and in Small Steps

Guideline

We generally recommend reducing by no more than 10% of the current dose, followed by a hold of at least 4 weeks.

Important points:

- This is a guideline, not a rule

- Many people need smaller reductions

- Stability is more important than speed

- If symptoms appear or intensify, the taper should be slowed down immediately.

What if 10% per month is too much?

This is very common.

Option A – Hold longer

Remain at the current dose until symptoms clearly settle. A 4-week hold may not be enough; longer holds are often appropriate.

Option B – Reduce the step size

Instead of 10%, reduce by:

- 5%

- 2.5%

- or even 1%

Smaller steps are often far better tolerated.

Option C – Micro tapering

A structured SA tapering method (Brass Monkey Slide):

- 4 weeks of small weekly reductions (e.g. ~2.5% per week)

- Followed by a 2-week hold

- Then reassess

- If needed, reduce percentages further or extend the holds.

Option D – If you went too fast

If symptoms escalate significantly:

- Consider a small up dose to the last stable dose

- Remain stable long enough before attempting further tapering

This is considered harm reduction, not failure!

Specific to Wellbutrin/ Bupropion IR (Instant Release)

IR can be cut. Use a digital milligram-precision scale to improve dose consistency.

Water tapering is another option. This can be useful when on very low dosages. Measuring the exact (low) dose is easier and more precise than with weighing.

Bupropion has a very short shelf life when dissolved in water. Make a new solution every day!

Some pharmacists can make or provide compounded liquids of bupropion.

 https://www.uspharmacist.com/article/bupropion-30-mg-ml-oral-suspension

Specific to Wellbutrin SR: 

SR can be cut – But it then becomes IR

SR is NOT soluble in water

Often changing to IR is the best option - Always use the crossover procedure (see below), then stabilise a few weeks before starting to taper.

Crossover

This is a necessary step to prevent issues. Crossover is best done from a stable state.

- For 4-7 days, ¼ of your dose of the liquid solution/ ¾ of your dose in the pill/powder form.

- For 4-7 days, ½ of your dose of the liquid solution/ ½ of your dose in the pill/powder form.

- For 4-7 days, ¾ of your dose of the liquid solution/ ¼ of your dose in the pill/powder form.

- Full dose in the liquid solution.

If at any stage, if withdrawal symptoms show up, hold till they subside then proceed with the schedule.

Specific to Wellbutrin XL: yes, XL can be cut – but it then becomes IR

In many countries outside the USA, only XL/XR is available. So, switching to IR is NOT possible then.

What happens when XL (XR) tablets are cut?

When a XL/XR tablet is cut, the extended-release mechanism is destroyed. The medication then behaves like immediate-release bupropion.

This means:

- Faster absorption

- Higher peaks and lower troughs

- Increased risk of activation, anxiety, and insomnia

Unfortunately cut XL/XR tablet can NOT dissolved in water or another fluid. Crushing is not possible either since some kind of glue is holding the pill together. Trying to crush the pill creates a kind of paste that makes carefully dosing impossible. Cutting and weighing is the only option when tapering.

Why is this important?

Immediate-release bupropion must be divided across the day to reduce fluctuations in blood levels and to avoid “dose dumping”.

People who cut XL typically dose:

- 3 times per day, or even 4 times per day, (when taking more than 75mg in total per day)

A crucial caution

If your nervous system has adapted to once-daily XL dosing, it may react to the change in release pattern.

Therefore:

- Before tapering further, you must first stabilise on the new divided-dose schedule.

- This stabilisation phase may take several weeks or longer.

😎 How to cut XL tablets as safely and consistently as possible

General SA guidance for cutting tablets:

- Use a very sharp knife. Pill cutters are not accurate enough for these hard pills (with a shell) with a somewhat sticky inside

- Store fragments carefully and keep daily dosing as consistent as possible

- Use a digital milligram-precision scale to improve dose consistency.

Must watch video by @Go2zero.  How to cut Wellbutrin XL/XR

How to cut Wellbutrin XL - Direct Link to Video

Dosing rules after cutting XL (now functioning as IR)

- Divide the total daily dose into 3 or 4 doses per day

- Take doses at regular, fixed times

- Avoid skipping doses or alternating days

- Do not make further dose reductions until stable on the new schedule

Key Do's & Don'ts

- Do not taper by skipping days

- Do not change multiple variables at once

- Do not rush the final stages

- Expect that lower doses are often harder, not easier

Closing summary

Wellbutrin (Bupropion) is not always easy to taper. While some people can reduce quickly, others experience significant withdrawal symptoms. When XL is the only available formulation, cutting and dividing doses is a valid harm-reduction approach, provided it is done carefully and with adequate stabilization. If 10% per month is too much, the solution is simple: slow down. The goal is not speed, but nervous system safety.

Edited August 23Aug 23 by Go2zero