How often does a pain pump need refilling?
Published by Kentuckiana Pain Specialists
Published: October 2026
Most intrathecal pain pumps need a refill every 1 to 6 months. Your interval depends on the size of the pump's reservoir, how concentrated the medication is, and your daily dose. A refill is a short office visit. A needle goes through the skin into the pump's fill port, it takes about 15 to 30 minutes, and there's no surgery involved.
What sets your refill schedule
| Factor | How it changes your interval |
|---|---|
| Reservoir size (commonly 20 mL or 40 mL) | A larger reservoir lasts longer |
| Medication concentration | A more concentrated mix lasts longer |
| Your daily dose | A higher dose empties the pump faster |
| Dose changes | Any adjustment moves your next refill date |
| Medication stability | Some drugs must be swapped out on a set schedule even if the pump isn't empty |
Your pump is programmed with the exact amount it holds and how fast it delivers. From that, it calculates when the reservoir will run low and sets an alarm date. Your care team should schedule the refill before the alarm date and any medication stability limit.
What happens at a refill visit
- Check-in. The team asks about your pain, side effects, sleep, and activity since the last visit.
- Pump check. A programmer held over the skin reads the pump: remaining volume, battery status, and any alarms.
- Access. The skin is cleaned and the fill port is located, often with a template placed over the pump.
- Old medication out. Whatever is left gets withdrawn and measured. That number should match what the pump expected. A mismatch can signal a problem, so this step matters.
- New medication in. The pump is refilled and reprogrammed, and your next refill date is set.
Ask whether you need a driver, especially if medication changes, symptoms, or sedation could affect driving.
What if you miss a refill
Don't let it happen. The pump sounds a low-reservoir alarm as it gets close to empty. Once it runs dry, withdrawal can start.
- With opioid medications, that can mean sweating, restlessness, stomach upset, and a sharp return of pain.
- With baclofen, which is used for spasticity, withdrawal can be dangerous. It can cause fever, confusion, and severe muscle stiffness, and it needs emergency care.
If you hear your pump alarm, contact your pump team right away. If you have withdrawal symptoms or trouble breathing, seek emergency care.
Planning around travel and life
Tell us about trips, surgeries, or anything that could make you miss a visit. Ask your pump team whether an earlier refill is needed and confirm the appropriate office before booking.
How long the pump itself lasts
The pump's battery lasts several years. When it runs low, the pump is replaced in a short outpatient procedure. The catheter usually stays in place, and your refill routine picks up right where it left off.
Related reading
Frequently asked questions
Does a refill hurt?
It involves a needle through the skin into the pump's refill port. Ask your care team what discomfort to expect and whether numbing is appropriate.
Can another clinic refill my pump?
Only a clinician trained on your pump, with the right programmer and your medication order. If you are moving, arrange the handoff with your pump team before the next refill is due.
Is there a limit on how long someone can have a pump?
No set limit. Many people keep their therapy for years, with battery replacements along the way.
Sources
At Kentuckiana Pain Specialists, intrathecal pain pump therapy is provided under the care of Ajith Nair, M.D., at our Louisville and Radcliff, Kentucky clinics. Our phones are answered 24/7 at (502) 995-4004, and a consultation is the best way to find out what fits your situation.
This is general information, not medical advice. Whether a treatment is right for you is determined by a physician after an evaluation.