At a glance
Biologic therapy using DMARDs (Disease-Modifying Antirheumatic Drugs) is a group of treatments that use proteins made from living cells to calm the part of the immune system that is attacking the body's own joints and tissues.
In conditions like rheumatoid arthritis, the immune system mistakenly sends out chemical signals called cytokines that trigger inflammation, causing joints to swell, stiffen, and break down over time. Biologic DMARDs block specific targets in this chain reaction, such as a protein called TNF-alpha or certain immune cells called B-cells or T-cells. By interrupting these signals, the medication reduces swelling, slows joint damage, and can improve daily function.
Medical Condition
Biologic DMARDs are prescribed when a patient's inflammatory joint or connective-tissue disease has not responded well enough to conventional DMARDs such as methotrexate, or when the disease is severe from the outset.
- Rheumatoid arthritis (an autoimmune disease causing chronic joint inflammation)
- Psoriatic arthritis (joint inflammation linked to the skin condition psoriasis)
- Ankylosing spondylitis (inflammatory arthritis affecting the spine)
- Juvenile idiopathic arthritis (chronic arthritis starting in childhood)
- Systemic lupus erythematosus, or lupus (an autoimmune disease affecting multiple organs)
- Vasculitis (inflammation of blood vessels)
- Adult-onset Still's disease (a rare inflammatory condition with fever and joint pain)
Biologic therapy is not suitable for everyone. A rheumatologist will carefully screen each patient before starting treatment.
- Active infections, including untreated tuberculosis (TB) or active hepatitis B
- Certain heart conditions, particularly advanced heart failure
- History of some cancers, depending on the specific biologic and cancer type
- Pregnancy or planning to become pregnant in the near term, for certain agents
- Severely weakened immune system from another cause
Risks & Complications
Biologic DMARDs lower immune activity, which reduces inflammation but also makes the body less able to fight off infections and other threats.
- Increased risk of bacterial, viral, and fungal infections, including respiratory infections and reactivation of latent tuberculosis
- Injection-site reactions such as redness, swelling, or pain where the medicine is given under the skin
- Infusion reactions (fever, chills, low blood pressure) for agents given by intravenous drip
- Reactivation of hepatitis B in patients who carry the virus
- Worsening of existing heart failure in susceptible patients
- Rare risk of certain cancers, particularly lymphoma (cancer of the lymphatic system), with long-term use of some agents
- Demyelinating disorders (conditions affecting the nerve's protective covering) in rare cases
- Allergic reactions, ranging from mild rashes to severe anaphylaxis (a sudden life-threatening allergic response)
Preparation & Procedure
Before starting biologic therapy, a rheumatologist carries out a thorough assessment to confirm the diagnosis, check for hidden infections, and rule out conditions that would make the treatment unsafe.
There are no fasting requirements for most biologic agents. If a dose will be given by intravenous infusion in a clinic, the care team may ask the patient to eat a light meal beforehand and to be well hydrated. Patients already on blood thinners or other medications should tell their doctor, who will decide whether any changes are needed before the first dose.
Smoking worsens inflammation and can reduce how well some biologics work; the medical team will usually raise this with the patient. Alcohol does not directly affect most biologic drugs, but it can interact with other DMARDs given at the same time, so the doctor will advise based on the full medication list.
Standard tests before starting treatment typically include:
- Blood tests: full blood count, liver enzymes, kidney function, and inflammatory markers such as CRP (C-reactive protein)
- Tuberculosis screening, usually a skin test (Mantoux) or a blood test called IGRA (Interferon-Gamma Release Assay), plus a chest X-ray
- Hepatitis B and C screening
- HIV screening in some settings
- Pregnancy test if applicable
- Vaccination review: several vaccines, including live vaccines, should be given before starting, because they cannot be safely given once treatment begins
Once cleared for treatment, the procedure itself follows a consistent pattern, though the exact steps depend on whether the biologic is given by injection under the skin (subcutaneous) or by intravenous drip (infusion).
- 1. The care team confirms the patient's identity, current weight if dose is weight-based, and vital signs.
- 2. The specific biologic medication is prepared according to the hospital's pharmacy protocol.
- 3. For subcutaneous injection: the nurse or the patient (after training) injects the medication into the abdomen, thigh, or upper arm using a pre-filled syringe or auto-injector pen.
- 4. For intravenous infusion: a cannula (a thin plastic tube) is placed in a vein, and the medication is delivered slowly, typically over one to several hours, with the patient seated or reclining comfortably.
- 5. The patient is monitored for infusion or injection reactions throughout and for a period afterward, usually 30 to 60 minutes post-dose in the clinic.
- 6. Vital signs are checked again before the patient is discharged.
Aftercare
Biologic therapy is an ongoing treatment rather than a one-time procedure, so aftercare covers both the immediate period after each dose and longer-term monitoring between doses.
- After a clinic infusion, patients usually rest in the observation area for 30 to 60 minutes before going home; most can return to normal activities the same day.
- For self-administered subcutaneous injections given at home, patients are trained by a nurse and should know the signs of an injection-site reaction to watch for.
- Regular blood tests, usually every few months, check liver function, kidney function, and blood cell counts to detect any side effects early.
- Any new fever, persistent cough, unusual skin infection, or wound that is slow to heal should prompt a call to the rheumatology team, as these can be signs of infection that needs treatment quickly.
- Live vaccines, such as yellow fever or BCG, cannot be given while on biologic therapy; a doctor should be consulted before any vaccination.
- Women of childbearing age will usually be asked about contraception, as some biologics require a washout period (time without the drug) before attempting pregnancy.
- Dental procedures that could cause bleeding or infection should be discussed with the treating rheumatologist before going ahead.
- Follow-up appointments with the rheumatologist are scheduled regularly to assess whether the disease is responding and whether the dose or drug needs to be adjusted.
Cost & What Determines It
Biologic DMARDs are among the most expensive medicines in modern rheumatology, and the total cost of treatment varies enormously depending on the specific drug chosen, where it is administered, and how long therapy continues.
- Choice of biologic agent: different biologics target different parts of the immune system and carry very different price tags; biosimilars (approved copies of original biologics) tend to cost less than the original branded drug
- Disease severity and complexity: a patient with multiple affected joints or overlapping autoimmune conditions may need higher or more frequent doses
- Hospital or clinic class: a public hospital, a private specialist centre, and an international hospital in the same city can bill very differently for the same drug
- Country of treatment: pricing regulations, import duties on the drug, and hospital fee structures differ significantly between countries
- Route of administration: intravenous infusions require a clinic visit, nursing time, infusion equipment, and an observation period, all of which add to the bill compared with self-injected options
- Frequency and duration: most biologics are given every two to eight weeks indefinitely; a longer course means a higher cumulative cost
- Pre-treatment tests: tuberculosis screening, hepatitis testing, blood panels, and imaging are billed separately at most centres
- Concurrent medications: patients often continue a conventional DMARD alongside the biologic, adding to the monthly medication cost
- Management of side effects: treating an infection or infusion reaction that arises during therapy will generate additional costs
Hospital packages for biologic therapy, where they exist, usually cover the drug itself, the infusion suite or clinic fee, nursing care during administration, and the post-dose observation period. Items commonly billed separately include pre-treatment laboratory tests, imaging, specialist consultation fees, and any medications needed to manage reactions.
Indonesian patients seeking biologic therapy abroad should be aware that BPJS Kesehatan does not cover treatment outside Indonesia, and most Indonesian private health insurance policies also exclude overseas care. Treatment costs are therefore typically paid out of pocket or through an international health insurance policy that explicitly covers treatment abroad. Before travelling, asking the overseas hospital for a written cost estimate that itemises the drug, infusion fees, monitoring tests, and consultation charges is the most reliable way to understand the full financial commitment.
Frequently Asked Questions
How many sessions of biologic therapy do I need?
The number of sessions depends on which biologic medicine your rheumatologist chooses and how your body responds to it. Some biologics are given every two weeks by injection, others are infusions (medicine dripped into a vein) given every four to eight weeks, and a few are daily self-injections at home. Your doctor will review your progress regularly and adjust the schedule if needed.
What does biologic therapy feel like, and does it hurt?
Most people tolerate biologic therapy well, though experiences vary depending on how the medicine is given. Injections may cause brief stinging or mild redness at the skin, while infusions are usually given while you sit comfortably and can take one to several hours. Some people feel mild fatigue or flu-like feelings for a day or two after a dose, but these tend to ease as treatment continues.
How soon will I feel better after starting biologic therapy?
Most patients begin to notice less joint pain and swelling within four to twelve weeks, though the full benefit often builds gradually over several months. Biologics work by targeting specific parts of the immune system (the body's defence system) that drive inflammation, so the response is not always immediate. Your rheumatologist will track your symptoms and blood results to judge whether the treatment is working well enough.
How much does biologic therapy cost?
The cost depends on which specific biologic medicine is prescribed, how often you receive it, and whether you need it as a clinic infusion or a home injection. The length of the treatment course and the class of hospital or clinic also affect the total amount. Requesting a written estimate from the hospital based on your treatment plan is the most reliable way to understand the actual cost for your situation.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
