Bladder Botox injections (Intravesical botulinum toxin A injection)

Injections of botulinum toxin (Botox) into the bladder wall to calm an overactive bladder when bladder training and medicines have not worked well enough.

✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review

In short

Bladder Botox relaxes an overactive bladder muscle so it squeezes less and holds more, easing urgency and leaks.
It is not a cure: the effect wears off after about 6–9 months, so injections need repeating.
Some people cannot empty the bladder fully afterwards and may need to self-catheterise for a time, so you should be willing and able to learn this first.
It is usually offered after bladder training and medicines have not worked, and is available on the NHS as well as privately.

A plain-English summary. The detail — including risks and recovery — is below.

At a glance

TypeBladder wall injection via a cystoscope

AnaestheticLocal anaesthetic, sometimes sedation, or a general/spinal anaesthetic

How long it takesUsually around 15–30 minutes

Hospital stayOutpatient or day case

When you'll see resultsOften works within days to about two weeks; the effect usually lasts about 6–9 months

On the NHS?Available on the NHS for overactive bladder when medicines have not worked or are not tolerated

A general guide. Your specialist will give you advice for your situation.

Best fit

Can markedly reduce urgency, daytime frequency and night-time trips to the toilet

Pause if

People who are unwilling or unable to learn self-catheterisation, given the risk the bladder will not empty.

Main recovery point

Expect possible blood in the urine and mild stinging when passing urine. Drink plenty of fluids. Watch how easily and completely you are passing urine.

Good aftercare

A clear way to check bladder emptying, with self-catheterisation teaching available.

First 1–2 days

Expect possible blood in the urine and mild stinging when passing urine. Drink plenty of fluids. Watch how easily...

First 1–2 weeks

The effect builds over this time, so urgency and leaks gradually improve. A urine infection is most likely in this...

Around 2 weeks

You usually have the full effect by now. If you are struggling to empty your bladder, you may be taught...

Up to 4 weeks

Very rarely, the toxin can spread beyond the bladder. Tell a doctor straight away — or call emergency services if...

Medical line illustration of male lower urinary tract anatomy for Bladder Botox injections. — Illustration only - not a diagnosis, medical advice or a promise of result. Your anatomy and treatment plan may differ. Vuemedics does not publish before-and-after photos.

What are bladder Botox injections?

Bladder Botox is a treatment for an overactive bladder — the sudden, frequent and hard-to-control urge to pass urine, sometimes with leaks (urgency incontinence). The same toxin used for muscle spasm and cosmetic treatments is injected, in tiny amounts, into the wall of the bladder. It relaxes the bladder muscle so it squeezes less often and can hold more urine.

The injections are given through a thin telescope (a cystoscope) passed up the water pipe (urethra) into the bladder. It is not surgery and does not involve any cuts. It is usually offered when bladder training and bladder medicines (such as anticholinergics or mirabegron) have not controlled symptoms or have caused side effects.

Bladder Botox does not cure overactive bladder. Its effect is temporary, usually lasting about six to nine months, so the injections need repeating to keep working. The most important thing to understand before treatment is that it can make the bladder empty too slowly, and some people need to learn to pass a thin tube to empty the bladder (self-catheterisation) for a while.

Types, options & approaches

There may be different ways to do this. The right approach depends on the clinical question and your circumstances.

Botox for idiopathic overactive bladder

Used when there is no underlying neurological cause. A standard dose (commonly 100 units) is injected at multiple points in the bladder wall to ease urgency, frequency and leaks.

Botox for neurogenic bladder overactivity

Used when overactivity is caused by a neurological condition (such as multiple sclerosis or spinal cord injury). A higher dose is often used, and self-catheterisation is more commonly needed.

Repeat injections

Because the effect is temporary, treatment is repeated when symptoms return, usually every several months, as long as it keeps helping and you tolerate it.

Awake versus asleep treatment

Often done awake under local anaesthetic in a clinic; sometimes done under sedation or a general/spinal anaesthetic, depending on you and the setting.

Bladder Botox versus other overactive bladder options

	Bladder Botox	Bladder medicines	Nerve stimulation
How given	Bladder injection	Tablets daily	Implant or nerve treatment
Lasts	About 6–9 months	While taking them	Ongoing
Main downside	Possible self-catheter	Side effects	Procedure/implant
Repeat needed	Yes	Daily	Maintenance

These are options to discuss after bladder training. The right choice depends on your symptoms, other health problems and how you feel about each downside.

Preparing for your injection

See a urologist or urogynaecologist, who will confirm the diagnosis and check bladder emptying, often with a bladder scan and sometimes urodynamic tests.
Be ready to discuss whether you are willing and able to learn self-catheterisation, as this may be needed if the bladder does not empty fully.
Tell the team about all medicines, especially blood thinners, and any history of urine infections.
Have a urine test beforehand, as an active infection usually needs treating first.
If you take blood-thinning medicine, ask whether and how it should be adjusted around the procedure.
Arrange transport home if you are having sedation or a general/spinal anaesthetic.
Plan for possible blood in the urine and mild stinging for a day or two afterwards.
Make sure the treatment is carried out by an appropriately qualified specialist (a urologist or urogynaecologist) using a licensed, genuine botulinum toxin product, not an unlicensed or counterfeit one.

What happens

The treatment is often done awake using local anaesthetic gel, sometimes with sedation, or under a general or spinal anaesthetic. You lie back, and a thin telescope (cystoscope) is passed up the urethra into the bladder, which is filled with fluid so the surgeon can see the bladder wall clearly.

Using a fine needle passed through the telescope, the surgeon injects small amounts of botulinum toxin at many points across the bladder muscle, usually sparing the area near the bladder outlet. The whole procedure usually takes around 15–30 minutes.

Afterwards you stay until you have passed urine and the team is satisfied your bladder is emptying. You may be taught to check how well you empty, and given advice on what to watch for.

Is this injection right for me?

A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.

May not be suitable if…

People who are unwilling or unable to learn self-catheterisation, given the risk the bladder will not empty.
Those with a current urine infection, which should be treated first.
People whose leaking is mainly stress incontinence rather than urgency, as Botox targets urgency.
Anyone with a known allergy to botulinum toxin or its ingredients.

Delay or rearrange if…

You currently have a urine infection.
You are pregnant, possibly pregnant or breastfeeding, until this is discussed with your clinician.
Your blood-thinning medicine needs adjusting before the procedure.
Your bladder emptying has not yet been assessed.

Alternatives to discuss

Bladder training, fluid and caffeine advice, and pelvic floor exercises.
Bladder medicines such as anticholinergics or mirabegron.
Nerve stimulation treatments, such as percutaneous tibial or sacral nerve stimulation.
Doing nothing further if symptoms are tolerable, or managing leaks with pads while deciding.

Before you decide

Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.

What matters most to me?

Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.

What are all my options?

Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.

What would make me pause?

Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.

What happens if I do nothing today?

For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.

Comfort, sedation or contrast choices

If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.

Local anaesthetic

Anaesthetic gel in the urethra; the treatment is done awake in a clinic and is usually well tolerated.

Sedation

Light sedation to keep you relaxed during the procedure if preferred.

General or spinal anaesthetic

Used in some settings or for anxious patients; needs transport home and a recovery period.

Benefits

Can markedly reduce urgency, daytime frequency and night-time trips to the toilet
Can reduce or stop urgency leaks for many people
Avoids the daily side effects some people get from bladder tablets
Can improve quality of life and confidence when other treatments have failed

Risks & complications

More common

A urine infection in the weeks after treatment
The bladder not emptying fully, which can need self-catheterisation for a time
Blood in the urine and mild stinging when passing urine for a day or two
The effect wearing off over months, so the urge symptoms return

Less common

Not being able to pass urine at all for a while, needing a catheter
Treatment not working well enough to help your symptoms
A more troublesome or repeated urine infection

Rare but serious

The toxin spreading beyond the bladder (called iatrogenic botulism). This is very rare but serious: it can cause drooping eyelids, slurred speech, blurred or double vision, difficulty swallowing, generalised muscle weakness and, at worst, difficulty breathing. Symptoms usually start 4 to 8 days after treatment but can appear up to 4 weeks later, and need immediate medical help.
An allergic reaction to the toxin
Injury to the bladder during the procedure

The most important specific risk is incomplete bladder emptying. BAUS lists both urine infection and difficulty emptying (which can need self-catheterisation) as occurring in more than 1 in 10 people. For this reason you should only have bladder Botox if you are willing and able to learn to self-catheterise should it be needed. Older women, and men, may be at higher risk of retention. Ask your clinician how they will check your bladder is emptying and what to do if it does not.

Published figures to discuss

Reported rates of incomplete emptying, the need for self-catheterisation and urine infection vary widely between studies, depending on the dose, how 'retention' is defined, the type of bladder problem and the patient. Older women and men appear to be at higher risk of retention. BAUS patient information gives cautious frequency bands, used below; published self-catheterisation rates range very widely.

Figure	Reported range	How to interpret it	Source / confidence
Urine infection after treatment	More than 1 in 10 (BAUS)	Most likely in the first weeks; usually treated with antibiotics.	Urinary retention after intravesical Botox: who is at risk? (PMC)ncbi.nlm.nih.govPublished figure
Difficulty emptying the bladder / needing self-catheterisation	More than 1 in 10 (BAUS); published self-catheter rates vary widely between studies	Often temporary. Higher risk in older women and in men; this is why willingness to self-catheterise is required.	Urinary retention after intravesical Botox: who is at risk? (PMC)ncbi.nlm.nih.govPublished figure
Blood in the urine	Between 1 in 10 and 1 in 50 (BAUS)	Usually settles within a day or two.	Urinary retention after intravesical Botox: who is at risk? (PMC)ncbi.nlm.nih.govPublished figure

These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.

What happens afterwards

There is no surgical recovery, but you may have some stinging and blood in the urine for a day or two, and you need to be sure your bladder is emptying properly before relying on the treatment.

First 1–2 days

Expect possible blood in the urine and mild stinging when passing urine. Drink plenty of fluids. Watch how easily and completely you are passing urine.

First 1–2 weeks

The effect builds over this time, so urgency and leaks gradually improve. A urine infection is most likely in this period; report burning, smelly urine or feeling unwell.

Around 2 weeks

You usually have the full effect by now. If you are struggling to empty your bladder, you may be taught self-catheterisation for a while.

Up to 4 weeks

Very rarely, the toxin can spread beyond the bladder. Tell a doctor straight away — or call emergency services if you have trouble breathing — if you notice drooping eyelids, slurred speech, difficulty swallowing, double vision or new muscle weakness anywhere in the body during this period. It is most likely 4 to 8 days after treatment.

About 6–9 months

The effect typically begins to wear off and symptoms return. A repeat injection can be arranged if the treatment helped and you tolerated it.

What's normal — and not a worry

Pink-tinged urine and mild stinging for a day or two
A gradual, rather than instant, improvement in urgency over up to two weeks
Needing to keep an eye on how well you empty your bladder
Symptoms slowly returning after several months as the effect fades

Aftercare

Drink plenty of fluids in the first day or two unless you have been told to limit them.
Watch how completely you empty your bladder, and follow advice on checking this.
Learn and use self-catheterisation if you are taught it, until your bladder recovers.
Report signs of a urine infection: burning, frequency, smelly or cloudy urine, or feeling unwell.
Seek urgent help if you cannot pass urine at all and your bladder feels full and painful.
Keep a note of when the effect starts and fades, to help plan repeat treatment.
Attend follow-up so your response and bladder emptying can be reviewed.

Before your injection

A urine test arranged beforehand to exclude infection
Willingness and ability to self-catheterise discussed in advance
Transport home if having sedation or anaesthetic
Knowing the signs of a urine infection and what to do
Knowing who to contact, and where to go, if you cannot pass urine
A plan for when and how repeat injections are arranged

⚠ Get urgent help if…

Being unable to pass urine at all, with a full, painful bladder — seek urgent help
Burning, frequency, smelly or cloudy urine, or fever — possible urine infection
Heavy or persistent blood in the urine, or passing clots
Drooping eyelids, slurred speech, difficulty swallowing, double vision, or muscle weakness anywhere in the body — these can appear from a few days up to 4 weeks after treatment (most often within 4 to 8 days) and need urgent medical help
Difficulty breathing — call emergency services
Feeling generally unwell with a high temperature after the procedure

Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.

General guidance — it doesn't replace the specific advice your specialist gives you.

Results & realistic expectations

A good result means much less urgency, fewer toilet trips and fewer or no urgency leaks, usually within about two weeks. Many people find it improves quality of life when tablets have not. It does not restore a 'normal' bladder and it does not treat other causes of leaking, such as stress incontinence when you cough or exercise.

The benefit is temporary, typically lasting about six to nine months, after which symptoms return and a repeat injection may be considered. How well it works and how long it lasts vary from person to person.

How long it lasts

Bladder Botox is not permanent. The effect usually lasts about six to nine months and then fades, so ongoing treatment means repeat injections over time. Some people choose to continue repeat injections for years; others switch to a different treatment if the downsides, such as needing to self-catheterise or repeated infections, outweigh the benefit.

Related tests, treatments or support

Bladder Botox is usually used on its own for overactive bladder, often after bladder training and medicines. It does not treat stress incontinence, which may need separate treatment. If urgency and stress leaks coexist, your clinician will explain which problem each treatment addresses.

Follow-up & long-term care

You will usually be reviewed to check how well the treatment worked and whether your bladder is emptying properly. Repeat injections are arranged when the effect wears off, provided the treatment helped and you tolerated it. Report any difficulty passing urine or signs of infection between appointments.

Plan for repeat injections roughly every several months if the treatment helps.
Continue any bladder-training and fluid advice alongside the injections.
Keep monitoring bladder emptying after each treatment.
Review with your clinician whether ongoing injections remain the best option for you.

Repeat, follow-on and what comes next

The effect is temporary, so repeat injections are the norm rather than the exception.
If the treatment does not work well enough, the dose may be adjusted or a different treatment considered.
Some people stop because of repeated infections or the need to self-catheterise.
Response and duration can change between treatments.

Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.

What good aftercare looks like

A clear way to check bladder emptying, with self-catheterisation teaching available.
A named contact and clear instructions for what to do if you cannot pass urine.
Advice on recognising and treating urine infections.
A plan for reviewing your response and arranging repeat injections.

What affects the cost

Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:

The specialist's fee and whether the treatment is done awake or under anaesthetic
The setting (outpatient clinic versus day-case theatre)
Anaesthetic or sedation fees if used
The toxin itself and the cystoscopy equipment
Urine tests and any urodynamic testing beforehand
Teaching and supplies for self-catheterisation if needed
Follow-up appointments and the cost of repeat injections over time

Make sure your written quote includes

The specialist's fee for the procedure
Facility or theatre fee, and any sedation or anaesthetic
Tests beforehand, such as urine testing or urodynamics
Cost and frequency of repeat injections
Self-catheterisation teaching and supplies if required
Follow-up appointments to review your response
What happens, and who pays, if you cannot empty your bladder or get an infection

On the NHS? Bladder Botox is available on the NHS for overactive bladder when medicines have not worked well enough or are not tolerated; private care is sometimes chosen for speed or choice of specialist.

You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.

Choosing a specialist safely

Check the specialist is on the GMC Specialist Register for this area.
Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
You're entitled to your total cost in writing — including any follow-up — before you decide.

How Vuemedics verifies every consultant →

Questions to ask your medical professional

Take this to your consultation. A good specialist will welcome every one of these.

Have I tried enough bladder training and medicines before considering Botox?
What is my personal risk of not emptying my bladder, and what would that mean?
Will you teach me self-catheterisation in advance in case I need it?
How will you check my bladder is emptying after the injections?
How often would I need repeat injections, and how is that arranged?
What should I do, and where should I go, if I cannot pass urine?
Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
Will you be the specialist who carries out my injection, and who looks after me afterwards?
What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
What does a realistic result look like — and what can this injection not achieve?
What are my options, including waiting, doing nothing for now, or choosing a different approach?
Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
What is the total cost in writing, including any follow-ups, and how much time do I have to decide?

Frequently asked questions

Is bladder Botox available on the NHS?

Yes. It is available on the NHS for overactive bladder when bladder medicines have not worked well enough or are not tolerated. Some people choose private care for speed or choice of specialist.

Will I need to use a catheter afterwards?

Possibly. Some people cannot empty the bladder fully after treatment and need to pass a thin tube to empty it (self-catheterisation) for a time. Because of this, you should only have the treatment if you are willing and able to learn this.

How long does it last?

The effect usually lasts about six to nine months and then wears off, so the injections need repeating to keep working.

Does it hurt?

It is often done awake with local anaesthetic gel and is usually well tolerated, though you may feel the telescope and some stinging. Sedation or a general/spinal anaesthetic can be used if preferred or needed.

When will it start working?

It often begins to work within a few days and reaches full effect by about two weeks.

Will it stop all my leaking?

It targets urgency leaks from an overactive bladder. It does not treat stress incontinence — leaking when you cough, laugh or exercise — which needs different treatment.

Find a verified specialist for bladder botox injections

Every consultant is GMC-checked and independently reviewed. Search by postcode and distance, or switch to a map. Ordered by rating, relevance and recency — never by who pays.

No verified consultants list this procedure yet — browse the full directory.

See all specialists for bladder botox injections →

How we made this page

Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →

Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.

Sources & standards: BAUS — Botulinum toxin-A (Botox) injections into the bladder wall (patient leaflet) NHS — Urinary incontinence treatment (overactive bladder) Incomplete emptying and UTIs after bladder Botox — SUFU multi-institution study (PMC) Urinary retention after intravesical Botox: who is at risk? (PMC) Catheterisation rates after intravesical onabotulinumtoxinA in clinical practice (PMC) MHRA — Botulinum toxin type A: updated warnings on iatrogenic botulism (July 2026)

Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.

Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.