Biologic drip service (infused biologic medicines) (Intravenous biologic (and biosimilar) infusion service)
A monitored service that gives biologic medicines through a drip into a vein, to calm an overactive immune system in inflammatory conditions such as rheumatoid arthritis.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Biologic infusions calm an overactive immune system in inflammatory disease; they control it rather than cure it, and they do not work for everyone.
- Because they reduce part of your immune defence, the main trade-off is a higher chance of infections, so you are screened first (for example for TB and hepatitis) and watched over time.
- Live vaccines are generally avoided while on biologics, so it is worth sorting vaccinations out before you start; flu and most COVID-19 vaccines are not live and are encouraged.
- Infusion reactions can happen during or soon after the drip, which is why the service monitors you closely and can treat reactions promptly.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Can reduce joint pain, swelling and stiffness when other treatments have not worked well enough
You have an active, untreated infection, including tuberculosis or hepatitis B that has not been managed.
Staff monitor you while the drip runs, as reactions are most likely then. Tell them at once about flushing, breathlessness, chest tightness, itch or...
A named contact route for reactions, infections and questions.
Staff monitor you while the drip runs, as reactions are most likely then. Tell them at once about flushing...
A small number of people feel washed out, headachy or have a delayed reaction. Most feel fine and can return to...
This is when early response often starts to show, with less pain and stiffness. Some people notice little at...
Your team reviews how well the medicine is working, using disease-activity scores and blood tests, and decides...
What is a biologic infusion service?
A biologic infusion service gives 'biologic' medicines through a thin tube (cannula) into a vein, in a clinic set up to watch you closely while the drip runs. Biologics are made from living-cell technology and target specific parts of the immune system rather than dampening all of it.
They are used for inflammatory conditions such as rheumatoid arthritis, psoriatic arthritis, axial spondyloarthritis, lupus and some types of vasculitis. Common infused biologics include infliximab, rituximab, tocilizumab and abatacept, and many are now given as 'biosimilars', which are highly similar, equally regulated versions of the original.
Not all biologics are drips. Many are given as injections you do at home. The infusion service exists for those that have to go into a vein, or where being monitored during the dose is sensible. Some people start on infusions and later move to injections, or the other way round.
It is important to understand what these medicines can and cannot do. They can calm inflammation, reduce pain and stiffness, and help protect joints from damage, but they do not cure the underlying condition, they do not work for everyone, and because they reduce part of your immune defence they raise the chance of infections. The benefit is judged over weeks to a few months.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Infusion versus home injection
| Infusion | Home injection | |
|---|---|---|
| Where | Monitored clinic | At home |
| Monitoring during dose | Yes, by staff | Self-monitored |
| Convenience | Clinic visits needed | More flexible |
| Reaction support | Immediate, on site | You contact the team |
Some biologics only come as infusions; others can be either. Your rheumatologist will discuss which form suits your condition, your veins and your preferences.
Preparing for your treatment
- Have screening before you start, which usually includes tests for tuberculosis (TB) and hepatitis B and C, and a check for other infections.
- Bring your vaccination history; ideally have any needed live vaccines (such as MMR, varicella/chickenpox, yellow fever, BCG) before starting, as these are generally avoided once on biologics. The current NHS shingles vaccine, Shingrix, is non-live and can be offered to eligible immunosuppressed people.
- Have the flu vaccine and recommended COVID-19 vaccines, which are not live and are encouraged.
- Tell the team about any current infection, recent travel, or contact with TB or chickenpox.
- List all your medicines, including steroids and other immune medicines, and any allergies or past infusion reactions.
- Tell the team if you could be pregnant, are planning pregnancy or are breastfeeding.
- Allow enough time, as some infusions take several hours plus a monitoring period.
- Treat any dental or other infection before starting where possible.
What happens
Before each infusion, the team checks how you are, looks for any signs of infection, and often does blood tests. A small tube (cannula) is placed in a vein. Some people are given pre-medication (such as paracetamol, an antihistamine or a steroid) to reduce the chance of a reaction.
The biologic is given slowly as a drip. How long this takes depends on the medicine, from under an hour to several hours. Staff watch you during the infusion, checking things like your pulse, blood pressure and temperature, because reactions are most likely while the drip is running or shortly after.
After the drip finishes you are usually monitored for a period, then the cannula is removed and you go home the same day. You are told what to look out for, when your next dose is due, and who to contact if you feel unwell.
Is this treatment 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…
- You have an active, untreated infection, including tuberculosis or hepatitis B that has not been managed.
- You have moderate or severe heart failure and an anti-TNF biologic is being considered.
- You have had a severe allergic reaction to the same medicine before.
- Your disease is mild enough to be controlled with simpler, lower-risk treatment.
- You cannot commit to the screening, monitoring and infection precautions the treatment needs.
Delay or rearrange if…
- You currently have an infection or are on antibiotics for one.
- You are due, or have recently had, a live vaccine.
- You have an operation or dental extraction planned, where timing may need coordinating.
- You could be pregnant, or are planning pregnancy, and this has not been discussed.
- Your screening tests or baseline bloods are incomplete or abnormal.
Alternatives to discuss
- Conventional DMARDs such as methotrexate, sulfasalazine or leflunomide, used alone or in combination.
- A biologic or targeted medicine given as a home injection or tablet rather than a drip.
- Steroids for short-term control while a longer-term plan is set up.
- Physiotherapy, exercise and other supportive care alongside medicines.
- Watchful monitoring if disease activity is currently low.
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.
Benefits
- Can reduce joint pain, swelling and stiffness when other treatments have not worked well enough
- Can help protect joints from further damage in inflammatory arthritis
- Can improve fatigue, function and quality of life for many people
- Given in a monitored setting, so reactions can be recognised and treated quickly
- Offers an option for people who cannot manage or do not respond to injections or tablets
Risks & complications
- Infusion reactions such as flushing, headache, itch, chills or feeling unwell during or soon after the drip
- A higher chance of infections (chest, urine, skin, throat) because part of the immune system is dampened
- A sore arm or bruising at the cannula site
- Cold sores, thrush or other minor infections becoming more frequent
- More serious infections needing antibiotics or hospital treatment
- Reactivation of a hidden infection such as tuberculosis or hepatitis B if not screened and managed
- Changes on blood tests, such as low blood counts or altered liver or cholesterol results
- Allergic-type reactions that mean the infusion is slowed, paused or stopped
- A severe allergic (anaphylactic) reaction during the infusion
- A rare brain infection (PML) with some B-cell therapies, reported very rarely
- Worsening heart failure with anti-TNF medicines in people who already have it
- Rare nerve, blood or immune problems, and a debated, generally small effect on certain cancers
The central trade-off with all biologics is infection risk: calming the immune system to control disease also reduces some of your defence. This is why screening for TB and hepatitis, keeping vaccines up to date, and having a clear plan for what to do when you get an infection all matter. Ask your rheumatologist how you will be monitored, what to do if you feel feverish or unwell, and how this medicine fits with any plans for pregnancy.
Published figures to discuss
How well a biologic works, and how likely side effects are, varies a great deal with the specific medicine, the condition being treated, other medicines, and a person's infection and vaccination history. Infusion reactions are most common with the first doses; infection risk is ongoing. Because of this variation, figures should be treated as cautious, source-defensible guides rather than precise predictions, and your team can give numbers specific to your medicine.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Infusion (acute) reactions | Reported in a minority of people, mostly with early doses and more often with some agents (such as infliximab) than others | Usually managed by slowing or pausing the drip and giving pre-medication; severe reactions are uncommon but the reason for close monitoring. | Guide sourcesClinical context |
| Serious infections | Increased compared with people not on biologics; varies by agent, dose, steroid use and other illnesses | Screening, vaccination and prompt treatment of infections reduce this risk; report fever or feeling very unwell early. | NHS — Biological and biosimilar medicinesnhs.ukSource-linked context |
| PML (a rare brain infection) with B-cell therapy | Very rare; reported on the order of a few cases per 100,000 treated people with rituximab in rheumatoid arthritis | Rare but serious; new neurological symptoms such as confusion, weakness or vision change should be assessed urgently. | NHS — Biological and biosimilar medicinesnhs.ukPublished 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 physical recovery in the surgical sense. Most people go home the same day and carry on as normal, though some prefer to rest on infusion day. What matters afterwards is watching for infections and judging the response over the following weeks.
- Feeling a little tired or headachy on the day of the infusion
- A tender or bruised spot where the cannula was
- Not noticing a sudden change, because benefit usually builds over weeks
- Catching minor infections (colds, cold sores) a bit more easily
- Gradual easing of joint pain and stiffness over the first weeks to months
Aftercare
- Watch for signs of infection (fever, productive cough, burning when passing urine, spreading redness) and seek advice promptly.
- Keep up your monitoring blood tests, as biologics need regular checks of blood counts and liver function.
- Avoid live vaccines unless your rheumatology team specifically agrees, and have flu and recommended COVID-19 vaccines.
- Tell any other clinician, dentist or surgeon that you are on a biologic, as it may need pausing around infections or operations.
- Carry a biologic alert or treatment card so others know what you are taking.
- Do not simply stop the medicine yourself; talk to your team if you want to pause or stop.
- Contact your team before travel, especially to areas where live travel vaccines are advised.
- TB and hepatitis screening completed before starting
- Needed live vaccines given before treatment, and flu/COVID vaccines arranged
- A biologic alert/treatment card to carry
- A clear plan for what to do if you get an infection
- Knowing the date and place of your next infusion
- A named contact route for problems or reactions
- Up-to-date monitoring blood tests booked
⚠ Get urgent help if…
- Breathlessness, wheeze, chest tightness, swelling of the lips or face, or feeling faint during or after the infusion
- A high temperature, shaking chills or feeling very unwell, which may signal a serious infection
- A productive cough, night sweats or weight loss, which can be signs of TB
- Burning when passing urine, spreading skin redness, or a wound that will not heal
- Yellowing of the skin or eyes, very dark urine, or unusual tiredness (possible liver or hepatitis problem)
- Unusual bruising, bleeding or a persistent sore throat (possible low blood counts)
- New weakness, confusion, vision or speech problems (seek urgent help)
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 your disease activity falls: less joint pain, swelling and stiffness, better function, and improved blood markers of inflammation. This is judged over weeks to a few months using disease-activity scores and blood tests, not by how you feel on infusion day.
Not everyone responds, and a medicine that helps at first can lose effect over time. A good response does not cure the condition or remove the need for monitoring, and it does not eliminate infection risk. If one biologic does not work well enough, your team can switch to another, so a single result is part of an ongoing plan rather than a final verdict.
Many people stay on a biologic for years while it keeps their disease under control and is well tolerated. Some lose response over time and need a switch; a few are able to reduce the dose or spacing if they do very well, under specialist guidance. The plan is reviewed regularly rather than fixed, and the medicine is usually continued only while it is clearly helping.
Related tests, treatments or support
Biologics are often used alongside a conventional DMARD such as methotrexate, which can improve how well they work and how long they last. They are generally not combined with another biologic at the same time, because of the added infection risk. Vaccinations, infection treatment and other medicines all need coordinating with your rheumatology team.
Follow-up & long-term care
Follow-up includes regular monitoring blood tests (blood counts, liver function and others depending on the medicine), reviews of disease activity, and checks for infection. You should be able to contact the team between visits if you develop an infection, a reaction or any of the warning signs, rather than waiting for the next appointment.
- Attend regular monitoring blood tests as advised.
- Keep flu and recommended COVID-19 vaccines up to date, and avoid live vaccines unless agreed.
- Tell every clinician, dentist and surgeon that you are on a biologic.
- Have a plan for pausing the medicine around serious infections or operations.
- Review with your team whether the medicine is still helping at each appointment.
- Carry a biologic alert/treatment card.
Repeat, follow-on and what comes next
- If a biologic does not work well enough, the usual step is to switch to a different one rather than simply repeat.
- Response can fade over time, so the medicine is reviewed regularly and may be changed.
- Doses may be paused around serious infections or operations and then restarted.
- Some people who do very well can, under guidance, reduce the dose or space out infusions.
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 named contact route for reactions, infections and questions.
- A clear, written infection plan and a biologic alert/treatment card.
- Regular monitoring blood tests with results reviewed and acted on.
- Coordinated vaccination advice, including avoiding live vaccines.
- Regular review of disease activity to judge whether to continue, switch or adjust.
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 or clinic fee for assessing suitability and choosing the medicine
- Pre-treatment screening (TB, hepatitis, other infections) and baseline blood tests
- The biologic medicine itself, which varies between agents and originator versus biosimilar
- The infusion-suite or day-unit fee, including nursing time and monitoring
- Any pre-medication given to reduce reactions
- Regular monitoring blood tests and review appointments
- Managing infections or reactions if they occur
- The consultation fee and what the suitability assessment includes
- Screening tests and baseline bloods, and whether they are included
- The cost of each infusion, including the medicine and nursing/monitoring time
- How many infusions are likely and how often
- Ongoing monitoring blood tests and review appointments
- What happens, and what it costs, if you have a reaction, an infection or do not respond
- Whether the originator or a biosimilar is used, and any difference in cost
On the NHS? Infused biologics are provided on the NHS when criteria for active, treatment-resistant disease are met; private infusion services are mostly used for speed or convenience rather than because the medicines differ.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Starting without TB and hepatitis screening.
- No discussion of infection risk or what to do when you get an infection.
- No mention that live vaccines should generally be avoided once started.
- Not explaining that benefit takes weeks to months and that the medicine may not work.
- No plan for monitoring blood tests or for pregnancy if relevant.
Marketing red flags
- Describing biologics as a cure rather than a treatment that controls disease.
- A 'no-risk' or 'risk-free' message that downplays infection risk.
- Offering infusions without proper screening or monitoring arrangements.
- Pushing a particular brand without mentioning equally regulated biosimilar options.
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.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Which biologic are you suggesting, why this one, and is it a drip or could it be an injection?
- What screening and vaccinations do I need before I start?
- How will you monitor me, and how often will I need blood tests?
- What exactly should I do if I get an infection or feel feverish?
- How will we know if it is working, and what is the plan if it is not?
- How does this fit with any plans for pregnancy or breastfeeding?
- 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 treatment, 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 treatment 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
Can I have biologic infusions on the NHS?
Will the infusion make me feel ill?
Why do I need screening before starting?
Can I have my normal vaccinations?
What should I do if I get an infection?
How soon will it work?
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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: NHS — Biological and biosimilar medicines Versus Arthritis — Biologic therapies (DMARDs) British Society for Rheumatology — Guidelines and standards NICE TA195 — Biologics after TNF inhibitor failure in RA MHRA Drug Safety Update — TNF-alpha inhibitors UKHSA — Shingles immunisation programme: information for healthcare practitioners
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.
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