Infusion Therapy

Infusion therapy in rheumatology is a treatment in which powerful anti-inflammatory or immune-modifying medicines are delivered directly into a vein, allowing them to reach the joints and tissues faster and more reliably than a tablet or injection under the skin.

During the session, a small needle or cannula (a thin, flexible tube) is placed into a vein, usually in the arm. The medicine flows slowly through a drip line over a set period — often one to several hours. Because the drug bypasses the digestive system entirely, the full dose goes straight into the bloodstream. Many of these medicines work by blocking specific proteins — such as TNF (tumour necrosis factor, a chemical that drives joint inflammation) or certain immune cells — that are overactive in rheumatic diseases.

Rheumatology infusion therapy is used when a patient's inflammatory or autoimmune condition has not responded well enough to standard tablets or injections, or when the disease is severe enough that a faster-acting, stronger medicine is needed from the start.

• Rheumatoid arthritis (RA) — a condition where the immune system attacks the lining of the joints
• Ankylosing spondylitis — chronic inflammation mainly affecting the spine and pelvis
• Psoriatic arthritis — joint inflammation linked to the skin condition psoriasis
• Systemic lupus erythematosus (SLE, or lupus) — an autoimmune disease that can affect joints, kidneys, skin, and other organs
• Vasculitis — inflammation of blood vessel walls
• Systemic sclerosis (scleroderma) — a disease that causes thickening and hardening of the skin and internal organs
• Juvenile idiopathic arthritis — persistent joint inflammation in children and adolescents
• Gout with severe, frequent flares that cannot be controlled by other medicines
• Myositis — inflammation of the muscles caused by an overactive immune response

Infusion therapy may not be suitable in certain situations. A rheumatologist will carefully assess each patient before recommending this treatment.

• Active serious infection, including untreated tuberculosis (TB)
• Certain heart conditions that could be worsened by the medicines used
• Known severe allergy (anaphylaxis) to the specific infusion medicine being considered
• Some forms of cancer, depending on the drug chosen
• Pregnancy or breastfeeding, for certain medicines — the doctor will assess this individually

Rheumatology infusion therapy is generally well tolerated, but like all medical treatments it carries recognised risks that patients should be aware of before giving consent.

• Infusion reaction — flushing (sudden warmth and redness), chills, headache, or mild dizziness during or shortly after the drip; this is the most commonly reported side effect and nursing staff are trained to manage it
• Lowered resistance to infection — because these medicines dampen the immune system, bacterial, viral, and fungal infections can be harder to fight off during the course of treatment
• Reactivation of latent (dormant) tuberculosis in patients who carry the TB bacteria without symptoms
• Allergic or anaphylactic reaction (a sudden, severe whole-body allergic response) — rare, but infusion suites are equipped to treat this immediately
• Injection-site bruising or discomfort where the cannula is placed
• Fatigue or flu-like feeling for a day or two after the session
• Elevated liver enzymes (signs of mild liver stress) detected on follow-up blood tests — usually temporary
• In rare cases, certain medicines in this class have been associated with worsening of pre-existing heart failure or neurological conditions — your doctor will screen for these beforehand

Preparation for rheumatology infusion therapy usually begins days to weeks before the first session. Your medical team will guide you through each step, but the points below give a general picture of what is typically involved.

Before the infusion, doctors usually ask patients to stop certain medicines temporarily — for example, some conventional disease-modifying drugs may be paused on infusion day, and blood thinners may need adjustment. Smoking and heavy alcohol use are generally discouraged throughout the course of treatment because they can interfere with how well the immune system responds and how the body heals. Fasting is not usually required for most rheumatology infusions, but the team will confirm this in advance.

Standard tests are typically carried out before the first infusion and repeated at intervals during the course of treatment:

• Blood tests — to check for active infection, liver and kidney function, and baseline blood cell counts
• TB screening — a skin test called a Mantoux test or a blood test called an IGRA (interferon-gamma release assay) to rule out latent TB
• Hepatitis B and C blood tests, because some medicines can reactivate dormant hepatitis
• Chest X-ray, in most protocols, to look for hidden lung or TB changes
• A review of current vaccinations — live vaccines are usually given before starting therapy if needed, as they cannot be given safely once the immune system is suppressed

On the day of the infusion, the procedure itself typically follows these steps:

• Arrival and vital signs check — blood pressure, heart rate, temperature, and weight are recorded
• A nurse places a small cannula into a vein, most often in the forearm or the back of the hand
• A pre-medication — such as an antihistamine or a steroid — is often given through the cannula to reduce the chance of an infusion reaction
• The infusion medicine is connected and the drip rate is set slowly at first, then increased if the patient feels well
• Nursing staff observe the patient throughout, checking for any signs of a reaction
• Once the infusion is complete, the drip line is flushed with a plain salt solution and the cannula is removed
• The patient rests for an observation period — usually at least thirty minutes to an hour — before being allowed to leave

Most patients go home the same day and do not need an overnight stay. For the first day or two after each infusion, mild fatigue or a flu-like feeling is common. The medical team will explain which symptoms are expected and which should prompt an urgent call.

• Rest on the day of the infusion if needed; most people can return to light daily activities the following day
• Avoid crowded places or contact with people who are visibly unwell for a short period after the infusion, as the immune system may be temporarily more suppressed
• Keep the cannula site clean and dry; any redness, swelling, or warmth at the site that develops after returning home should be reported to the clinic
• Attend all scheduled follow-up blood tests — these monitor liver function, kidney function, and blood cell counts to catch any early changes
• Report fever, chills, unusual cough, or any sign of infection to the medical team promptly, as infections can progress more quickly when the immune system is dampened
• Avoid live vaccines (such as yellow fever or certain flu vaccines) during the course of infusion therapy unless specifically approved by the rheumatologist
• Continue any other medicines exactly as directed by the doctor — do not stop them without discussion
• Infusion therapy for rheumatic disease is usually given as a series of sessions spaced weeks or months apart; the schedule depends on the medicine chosen and how well the patient responds
• Lifestyle measures — gentle, regular movement, a balanced diet, not smoking, and limiting alcohol — support the overall treatment plan