Intrathecal drug delivery (pain pump)

An implanted pump that delivers pain or anti-spasm medicine directly to the fluid around the spinal cord, used only for selected people with severe pain after other options have failed and a trial.

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

In short

A pain pump delivers medicine directly to the fluid around the spinal cord, so much smaller doses can ease severe pain or spasticity.
It is for carefully selected people after other treatments fail, usually following a trial dose, and after specialist assessment — not a first option.
It reduces rather than cures pain, needs lifelong refills and monitoring, and carries surgical, device and serious drug-related risks.
Be cautious of any promise of a cure or of escalating opioid doses without clear review; honest selection and aftercare are essential.

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

At a glance

TypeImplant procedure (trial first, then implanted pump if it works)

AnaestheticTrial dose under local anaesthetic; pump implant often general anaesthetic, or local with sedation

How long it takesThe implant operation usually takes around 1–2 hours

Hospital stayOften a short hospital stay after the implant

Time off workSeveral weeks of restricted movement while the wounds and catheter settle

When you'll see resultsA trial first shows whether direct spinal medicine helps enough to implant

On the NHS?Available on the NHS for selected patients, often for cancer pain or severe spasticity; also offered privately

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

Best fit

Can control severe pain or spasticity that other treatments have not managed

Pause if

Your pain or spasticity has not been properly treated with less invasive options first.

Main recovery point

You are monitored after the test dose to see whether it eases your pain or spasticity and whether you tolerate it, which guides whether to implant a pump.

Good aftercare

A named contact and a 24-hour route for overdose, withdrawal, infection or pump failure.

Trial (test dose)

You are monitored after the test dose to see whether it eases your pain or spasticity and whether you tolerate it...

First days after the implant

Expect soreness at the back and tummy wounds and possibly a headache from the spinal puncture. You are watched...

First 2–6 weeks

Avoid bending, twisting, stretching and heavy lifting to protect the catheter while wounds heal. The dose is...

Ongoing (for life)

The reservoir is refilled at intervals (often every few months) and the dose and benefit reviewed. Settings are...

Medical line illustration of implanted spinal drug stimulation device for Intrathecal drug delivery (pain pump). — 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 is an intrathecal drug delivery system (pain pump)?

An intrathecal drug delivery system, often called a pain pump, is an implanted device that delivers medicine straight into the cerebrospinal fluid around the spinal cord, through a thin tube (catheter). A small pump and reservoir sit under the skin of the tummy and are refilled with a needle every so often. Because the medicine acts right where pain or muscle signals travel, much smaller doses can work than when the same drug is taken by mouth.

It is used mainly for severe pain that other treatments have not controlled — particularly cancer pain — and for severe muscle stiffness (spasticity). It is not a first treatment, and it is reserved for carefully selected people after specialist assessment.

A pump usually follows a trial to check the medicine helps and is tolerated. It reduces pain rather than curing it, and it carries real risks — surgical complications, catheter and pump problems, and serious drug-related dangers such as breathing problems from opioids or an inflammatory lump (granuloma) at the catheter tip. It needs lifelong refills and monitoring. It works as part of a wider plan, not as a stand-alone solution.

Types & techniques

There isn't one single operation. The right approach depends on you — which is something to discuss with your surgeon.

Trial (test dose) phase

A test dose of the medicine is given into the spinal fluid, often by injection or a temporary catheter, to check it helps enough and is tolerated before a permanent pump is implanted.

Programmable pump

An implanted pump whose dose and timing can be adjusted electronically through the skin, allowing fine-tuning and dose changes without surgery.

Fixed-rate pump

A simpler pump that delivers medicine at a set rate; dose is changed mainly by altering the medicine concentration at refill.

Medicines used

Commonly an opioid (such as morphine) for pain, sometimes with local anaesthetic, or a muscle-relaxant (baclofen) for severe spasticity. The choice depends on your condition.

Refill and review system

The reservoir is topped up with a needle through the skin at intervals (often every few months), and the dose and benefit are reviewed each time.

Pain pump versus other approaches

Option	What it offers	Things to weigh
Intrathecal pump	Direct spinal medicine at low doses for severe, refractory cases	Surgery; lifelong refills; serious drug and device risks
Medicines by mouth or patch	Simpler, no surgery	Higher doses and more body-wide side effects for the same effect
Spinal cord stimulator	Implant using electrical pulses, no drug reservoir	Different risks; suited to some nerve pains, not all situations
Specialist palliative or pain care	Coordinated symptom control and support	May be enough without an implant for many people

A pump is considered only for selected, severe, refractory cases after specialist assessment and usually a trial.

Preparing for your surgery

Be assessed by a specialist pain or palliative team, who decide whether a pump is appropriate and discuss it within a wider plan.
Make sure you understand a trial usually comes first to check the medicine helps and is tolerated.
Tell the team about all medicines, especially other opioids, sedatives and blood thinners, which must be managed carefully.
Mention any infection, skin problems over the tummy, or a weakened immune system, as these raise infection risk.
Discuss expectations honestly — the aim is better pain or spasticity control and function, not a cure.
Ask how refills, dose changes and emergencies will be handled, and who is responsible for them.
Plan for a short hospital stay, restricted movement afterwards, and help at home.
Understand the importance of never missing a refill, as some medicines are dangerous to stop suddenly.

What happens

Usually a trial comes first: a test dose of the medicine is given into the spinal fluid, sometimes by a single injection and sometimes through a temporary catheter, to see whether it eases your pain or spasticity and is well tolerated.

If the trial works, the pump is implanted in an operation, often under general anaesthetic or local anaesthetic with sedation. A thin catheter is placed into the intrathecal space around the spinal cord and tunnelled under the skin to a pump and reservoir placed in a pocket in the tummy wall. This needs an incision in the back (or side) for the catheter and a larger incision over the pump pocket. The operation usually takes around one to two hours, and you may stay in hospital for a short time.

Afterwards the pump is programmed and the dose adjusted to find what works for you. The reservoir is later refilled with a needle through the skin at intervals, and the dose and benefit are reviewed each time.

Is this operation 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…

Your pain or spasticity has not been properly treated with less invasive options first.
The trial (test dose) did not give enough benefit or was not tolerated.
You have an active or untreated infection, making an implant unsafe.
Reliable refills and follow-up cannot be arranged, which is essential for safety.
A specialist assessment suggests an implant is unlikely to help or that other issues need addressing first.

Delay surgery if…

You have any current infection or unhealed skin problem near the implant sites.
Your blood-thinning or sedating medicines have not been safely managed.
You have not completed the specialist assessment or a trial.
Your symptoms or neurological signs have changed and need fresh assessment.
Arrangements for refills, monitoring and emergency cover are not yet in place.

Alternatives to discuss

Optimised pain or spasticity medicines by mouth, patch or injection.
A spinal cord stimulator in suitable nerve-pain cases.
Specialist palliative or pain-clinic care for coordinated symptom control.
Non-drug measures, physiotherapy and psychological support.
No implant, with continued specialist care, if the likely benefit is low or the trial fails.

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.

Anaesthetic choices

The safest option depends on the operation, your health, the facility and your surgeon/anaesthetist. Ask what is planned and why.

Local anaesthetic (trial)

The test dose is usually given with local anaesthetic and close monitoring of breathing and symptoms.

General anaesthetic (implant)

The pump implant is often done under general anaesthetic, with its own risks, or under local anaesthetic with sedation.

Benefits

Can control severe pain or spasticity that other treatments have not managed
Uses much smaller drug doses than tablets or patches, which can mean fewer body-wide side effects
Doses can be adjusted, and programmable pumps fine-tuned, without further surgery
May reduce the burden of high-dose oral opioids in selected people
Can improve comfort, function and quality of life when it works well, including in cancer care
Is reversible in principle — the system can be removed if needed

Risks & complications

More common

Pain, bruising or soreness at the back and tummy wounds while healing
A headache after the procedure from the spinal-fluid puncture
The need for regular refills, dose adjustments and clinic visits for life
Side effects of the medicine, such as nausea, itching, constipation or drowsiness

Less common

Wound or pocket infection, sometimes needing antibiotics or device removal
Catheter problems — kinking, blockage, disconnection or movement — affecting the dose
A pocket of fluid or blood (seroma or haematoma) around the pump
Pump or programming faults, or running the reservoir empty
Persistent spinal-fluid leak causing ongoing headache

Rare but serious

An inflammatory lump at the catheter tip (granuloma) that can press on the spinal cord and cause neurological problems
Serious infection around the spinal cord, such as meningitis or an epidural abscess
Dangerous overdose or withdrawal if the dose, refill or pump goes wrong — opioids can cause life-threatening breathing problems, and stopping baclofen suddenly can be very dangerous
Nerve or spinal cord injury, very rarely causing weakness or paralysis

This is implant surgery near the spinal cord combined with powerful medicines, so safety depends on an expert team and reliable follow-up. The most serious dangers are drug-related: opioid overdose causing breathing problems, sudden withdrawal (especially abruptly stopping baclofen, which can be life-threatening), and granuloma at the catheter tip. Refill and programming errors are a known cause of harm. Ask who runs your refills, what the emergency plan is, and how doses are kept under careful review rather than simply escalated.

Published figures to discuss

Reliable rates are hard to pin down because pumps are used in small, varied groups of seriously ill patients, and complications range from minor to life-threatening. Reports highlight surgical problems (infection, bleeding, CSF leak), catheter and pump faults, and serious drug-related events including granuloma, overdose and withdrawal. Many harms relate to refill and programming errors rather than the device alone, so cautious wording is used here rather than invented percentages.

Figure	Reported range	How to interpret it	Source / confidence
Pump or catheter malfunction	Uncommon to common over the lifetime of the device	Blockage, disconnection, migration or battery end-of-life can cause loss of pain control or withdrawal.	Guide sourcesClinical context
Drug overdose or withdrawal	Rare but potentially life-threatening	Severe sleepiness, breathing difficulty, confusion, fever, rigidity or sudden return of pain needs emergency assessment.	Guide sourcesClinical context
Infection requiring antibiotics or device removal	Uncommon, often quoted in low single-digit percentages in implanted-device series	Fever, wound redness, discharge or meningitis symptoms after implantation or refill need urgent review.	Adverse events and complications of intrathecal drug delivery systems (MAUDE analysis, PMC)pmc.ncbi.nlm.nih.govSource-linked context
Granuloma at the catheter tip	Rare, higher with some high-dose intrathecal opioids	New neurological symptoms or escalating pain despite dose increases should prompt specialist review.	Guide sourcesClinical context

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.

Recovery — what to expect, and when

Recovery follows the implant operation and needs several weeks of careful, restricted movement while the back and tummy wounds heal and the catheter settles. Beyond that, living with a pump means ongoing refills and reviews rather than a one-off recovery.

Trial (test dose)

You are monitored after the test dose to see whether it eases your pain or spasticity and whether you tolerate it, which guides whether to implant a pump.

First days after the implant

Expect soreness at the back and tummy wounds and possibly a headache from the spinal puncture. You are watched closely, especially for breathing if an opioid is used, and may stay in hospital briefly.

First 2–6 weeks

Avoid bending, twisting, stretching and heavy lifting to protect the catheter while wounds heal. The dose is adjusted and you learn how refills and reviews will work.

Ongoing (for life)

The reservoir is refilled at intervals (often every few months) and the dose and benefit reviewed. Settings are optimised and any problems addressed.

What's normal — and not a worry

Soreness, bruising and tightness around the back and tummy wounds
A headache for a few days after the spinal-fluid puncture
Needing to limit bending, twisting and lifting in the early weeks
Some trial-and-error while the dose is adjusted
Feeling the pump as a firm disc under the skin of the tummy

Aftercare

Keep the wounds clean and dry and follow advice on dressings and showering.
Avoid bending, twisting, stretching and heavy lifting in the early weeks to protect the catheter.
Never miss a refill appointment — running out can cause dangerous withdrawal or loss of pain control.
Take only the additional medicines your team approves; avoid extra opioids or sedatives that could be dangerous with the pump.
Watch the wounds for signs of infection and report them early.
Carry your device identification card and tell other clinicians about the pump before any scan, surgery or new medicine.
Learn the warning signs of overdose (very drowsy, slow or shallow breathing) and of withdrawal, and who to call urgently.
Attend all follow-up and refill appointments for dose review and pump checks.

Before-surgery checklist

Specialist team assessment completed and a trial done
A clear, written plan for refills and who is responsible
An emergency plan for overdose, withdrawal and pump problems
Help arranged at home for the restricted early weeks
Your device identification card and refill schedule
The clinic's contact number and a 24-hour route for emergencies
Warning signs of overdose and withdrawal understood

Scars and how they heal

The pump implant leaves more than one scar: usually a smaller incision in the lower back (or side) where the catheter enters near the spine, and a larger incision — several centimetres long — over the tummy where the pump and reservoir sit in a pocket under the skin. The pump is felt as a firm disc and is often visible as a bulge, especially in slim people. Scars fade over months but remain, and there is a small chance of the skin over the pump thinning or breaking down, or the pocket needing revision.

⚠ Get urgent help if…

Very drowsy, confused, or slow or shallow breathing — possible opioid overdose, call emergency services
Fever, rigours, severe headache, neck stiffness, or spreading redness or discharge at a wound — possible serious infection
New or worsening leg weakness, numbness, or loss of bladder or bowel control — seek emergency help (possible granuloma or cord problem)
Sudden return of severe pain, or signs of withdrawal such as agitation, high temperature or muscle rigidity (especially with baclofen)
A severe headache after the procedure, worse on sitting or standing
The skin over the pump becoming very thin, red or breaking down, or fluid leaking from a wound

Who to contact: your surgeon or clinic 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 surgeon gives you.

Results & realistic expectations

A 'good' result is meaningful, lasting control of severe pain or spasticity with smaller drug doses and fewer body-wide side effects than tablets or patches, allowing better comfort and function. In cancer pain in particular, a pump can improve symptom control when other routes have failed. The trial helps predict who will benefit.

A pump does not cure the underlying condition or remove all symptoms, and the dose may need adjusting over time. Success depends on careful selection, a positive trial, expert implantation and, above all, reliable lifelong refills, monitoring and dose review. It is one part of a wider pain or palliative plan, not a stand-alone fix.

How long it lasts

A pump can give benefit for years, but it needs regular refills (often every few months) and the battery in programmable pumps eventually runs out, needing the pump to be replaced with an operation. Catheters can block, kink or move over time, and the dose may drift up or need changing. Some people need revision surgery, and occasionally the system is removed, for example if it stops helping or becomes infected.

Combining with other procedures

An intrathecal pump is used alongside the wider pain or palliative plan, including non-drug measures, psychological support and treatment of the underlying condition. It is not usually combined with high-dose oral opioids, since part of the aim is to reduce body-wide opioid exposure; your team will coordinate all your pain medicines.

Follow-up & long-term care

After the implant you are seen for wound checks and dose adjustment, then reviewed at every refill for benefit, side effects and pump function. You should have a clear, named route for refills and a 24-hour plan for emergencies such as suspected overdose, withdrawal, infection or pump failure. Doses should be reviewed and justified, not simply escalated.

Regular refills of the reservoir, often every few months, that must not be missed
Dose review and reprogramming to keep control effective and safe
Eventual pump replacement (an operation) when the battery runs out
Possible revision surgery if the catheter blocks, kinks or moves
Telling any clinician about the pump before scans, surgery or new medicines
An ongoing emergency and withdrawal plan, especially for baclofen pumps

Revision and secondary surgery reality

Pumps need refilling for life and eventually replacing with an operation when the battery runs out.
Catheter problems (blockage, kinking, movement) are a recognised reason for revision surgery.
If infection reaches the device, it usually has to be removed and re-implanted later once cleared.
Doses may need changing over time, and a granuloma at the catheter tip can require surgery.

Ask your surgeon for their own revision rate, what counts as a revision, and what is included in the written aftercare policy.

What good aftercare looks like

A named contact and a 24-hour route for overdose, withdrawal, infection or pump failure.
A clear, reliable refill schedule that is never allowed to lapse.
Regular dose review that justifies changes rather than simply escalating.
Clear instructions on scans, new medicines and telling other clinicians, with a device card.
Joined-up care with the pain or palliative team and an honest plan if benefit fades.

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 team assessment before treatment
The trial (test dose) and, if successful, the implant operation
The surgeon's and anaesthetist's fees and theatre costs
The pump and catheter, and whether the pump is programmable
Ongoing refills, medicines and dose-review appointments for life
Possible future costs for pump replacement or revision surgery
Management of any complication, which can add significantly to cost

Make sure your written quote includes

Whether the specialist team assessment is included
The cost of the trial and, separately, the implant operation
Surgeon, anaesthetist and facility fees
The pump and catheter, and the type of pump
The ongoing cost and arrangements for refills and reviews
Who provides emergency and out-of-hours cover for pump problems
The policy and cost for complications, revision surgery or pump replacement

On the NHS? Intrathecal pumps are available on the NHS for selected patients, often for severe cancer pain or spasticity, after specialist assessment and a trial; private access may be used for speed or choice.

You're entitled to your total cost in writing — including aftercare and any revision — before you decide.

Choosing a surgeon safely

Check your surgeon is on the GMC Specialist Register for this area.
Make sure they practise at a CQC-registered location, and look for membership of bodies like BAAPS or BAPRAS.
You're entitled to a two-stage consent process with time to reflect (a cooling-off period). The surgeon who will operate must consent you — not a salesperson.
Be wary of pressure: time-limited offers, discounts 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 aftercare and any revision — before you decide.

How Vuemedics verifies every consultant →

Questions to ask your medical professional

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

Am I a suitable candidate, and what did the trial show?
Which medicine would be used, and what are its specific risks for me?
Who is responsible for my refills, and what is the 24-hour emergency plan?
How will the dose be reviewed over time, and how do you avoid simply escalating it?
What are your own infection, catheter and complication rates?
What happens if the pump fails, becomes infected, or stops helping?
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 surgeon who carries out my operation, 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 operation 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 a pain pump a cure?

No. It aims to control severe pain or spasticity with smaller drug doses, not to cure the cause. It does not remove all symptoms and needs lifelong refills and monitoring.

Why do I need a trial first?

Because not everyone benefits and the medicine must be tolerated. A test dose into the spinal fluid checks whether direct spinal medicine helps enough before committing to an implanted pump.

What are the most serious risks?

Drug-related dangers are the most serious: opioid overdose causing breathing problems, sudden withdrawal (especially stopping baclofen abruptly), and a granuloma at the catheter tip. Surgical and device problems also occur. Expert teams and reliable refills reduce these risks.

How often does it need refilling?

Often every few months, but the interval depends on the medicine, dose and pump. Refills must never be missed, as running out can cause dangerous withdrawal or loss of control.

Can I get it on the NHS?

Yes, for selected patients — for example severe cancer pain or severe spasticity not controlled by other means — after specialist assessment and usually a trial. It is also offered privately.

Is it the same as a spinal cord stimulator?

No. A stimulator uses electrical pulses and has no drug reservoir; a pain pump delivers medicine into the spinal fluid. They suit different situations and carry different risks.

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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: NICE NG193 — Chronic pain (primary and secondary) in over 16s Faculty of Pain Medicine — Core Standards for Pain Management Services (CSPMS UK 2021) Implantable intrathecal drug delivery system — StatPearls (NCBI) Adverse events and complications of intrathecal drug delivery systems (MAUDE analysis, PMC) Implantable intrathecal pumps for chronic pain: highlights and updates (PMC)

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.