Etanercept

• You must see your rheumatologist regularly to make sure the treatment is working and check for possible side effects.
• You should have regular blood tests as suggested by your rheumatologist.
• It is important to tell your rheumatologist if you have a new serious illness such as a serious infection, cancer or heart failure.
• If you are worried about any side effects, you should contact your rheumatologist as soon as possible.
• If you stop etanercept for any reason, you must contact your rheumatologist. Failure to do so may mean that your treatment may no longer be funded.
• If you plan to become pregnant, you must discuss the timing with your rheumatologist

Etanercept can help people with inflammatory arthritis live longer with a better quality of life. Studies show that patients who take etanercept have a lower risk of death and fewer flares. 
Many patients with inflammatory arthritis experience reduced pain, swelling, and stiffness. Etanercept helps to slow or stop disease progression and prevent joint or organ damage. This can enhance mobility and reduce disability caused by the condition. You may notice lessening of joint swelling, pain and stiffness, often within the first 8 weeks of starting. It is important to continue taking the medicine as prescribed to see full benefits.

The biosimilar version of etanercept (brand name Brenzys) has been in use in Australia since early 2017. A biosimilar is a version of etanercept shown to have similar safety and benefit as the original brand. Make sure you are given the same brand each time. If you need to change brands, your rheumatologist will advise you to and will monitor for side effects.

• If you stop or delay your etanercept treatment, your condition may worsen again. Continue with your treatment, unless told by your rheumatologist to stop or unless side effects occur (see Side effects).
• If you stop etanercept for any reason, you must contact your rheumatologist. Failure to do so may mean that your treatment may no longer be funded.

• Medications like etanercept are very expensive and highly subsidised by Medicare. Certain conditions must be met to receive it.
• Etanercept will only be given if your disease is active and if standard treatments have not worked.
• It will only be continued if it helps your condition. This must be checked between 12 and 16 weeks after the start of treatment.
• Blood tests are needed during your treatment to watch for side effects and decide if the treatment is working.
• How often you have blood tests will depend on what other medicines you are taking and what other illnesses you might have. Your rheumatologist will advise on this.

• Etanercept is injected under the skin of the abdomen or thigh. It comes in a pen or a syringe injection.
• It can be injected by your doctor, nurse, carer or by you. If injecting yourself, be sure to follow the detailed instructions carefully to ensure the best response. It is very important to change where you inject each time.

• The usual dose for adults with arthritis is 50mg once a week. In children the dose is usually less and may be given twice a week.

Etanercept may be used with other arthritis medicines including:

• other DMARDs such as methotrexate
• steroid medicines such as prednisolone or cortisone injections into the joint
• anti-inflammatory medicines (NSAIDs) such as naproxen (Naprosyn) or ibuprofen (Brufen, Nurofen)
• simple pain medicines such as paracetamol.

Etanercept cannot be used with other bDMARDs. 

There are separate information sheets for the medicines mentioned above.

You might experience side effects with your treatment. Contact your rheumatologist if you have any concerns about possible side effects.
 
Many side effects disappear when etanercept treatment is stopped.

Most common possible side effects

• Mild pain, swelling or itching at the site of the injection are very common (up to 20% of patients) but can be reduced by applying ice and antihistamine/steroid creams to the injection site and/or leaving the medicines out of the fridge for 15-30 minutes before injecting.
• Headaches, cough, stomach and bowel discomfort may also occur.
• As etanercept affects the immune system, mild infections, mainly the upper respiratory tract (e.g. colds, sinusitis) may occur more often. Treatment with etanercept may need to be briefly stopped for a serious infection so contact your rheumatologist for advice.

Less common or rare possible side effects

• Serious infections such as tuberculosis (TB) are seen rarely, and screening for TB is needed before treatment begins.
• Rarely, etanercept may cause an allergic reaction with itchy, red skin or a rash or a feeling of tightness in the chest and trouble breathing.
• Side effects involving the nerves, such as inflammation of the nerve to the eye, may also occur rarely, causing changes in vision or sensation.
• Very rarely ‘drug-induced lupus’ has occurred with symptoms of rash, fever and increased joint pain.
• Annual skin checks are suggested with any medicines that can suppress the immune system as there is a slight increase in risk in skin cancers. To date research and use over 20 years, have not shown an increase in risk of other cancers.

Infections

• If you have a current infection of any kind treatment with etanercept should not be given until the infection is treated.
• You will need some blood tests and a chest X-ray to exclude some chronic infections before your first bDMARD.

Precautions with other diseases
Worsening may occur of the following conditions:

• multiple sclerosis
• moderate to severe heart failure.
• systemic lupus erythematosus (lupus/SLE). People with SLE are not often given etanercept but each case will be assessed whether safe by your rheumatologist

Use with other medicines

• Etanercept can interact with other medicines. You should tell all your doctors about all medicines you are taking or plan to take. This includes over-the-counter or herbal/naturopathic medicines.

Vaccines

• If you are taking etanercept you should not be immunised with ‘live’ vaccines such as MMR (measles, mumps and rubella), Varicella vaccine (Chicken pox/shingles), OPV (oral polio virus), BCG (Bacillus Calmette Guerin), Japanese Encephalitis or Yellow Fever. Talk with your rheumatologist before receiving any vaccines.
• COVID-19, pneumococcal vaccines and the yearly seasonal flu vaccinations are safe and encouraged.

More information is available on Vaccinations in Rhematology and Respiratory and COVID-19 infection information.

Surgery

• You might need to stop taking etanercept for a short time before and after surgery, especially if you have a higher risk of infection or if getting an infection could cause serious problems. Talk to your rheumatologist before having any surgery.

Use with alcohol

• You may drink alcohol while taking etanercept. If you are also taking methotrexate, you should be cautious about how much alcohol you drink.

Use in pregnancy and when breastfeeding

• It is important to discuss with you doctor if you are planning a pregnancy while on etanercept.
• It may be used in pregnancy and in men trying to father a child.
• If etanercept is kept going beyond 4 months of pregnancy it may increase the risk of infection in the newborn when live vaccines may be due. 
• The rotavirus vaccine should be given within the first 6 months of life. MMR may be given at 6 months. Discussion with a neonatologist/paediatrician is recommended. 
• There is only limited information regarding etanercept in breastmilk and while small amounts may occur, it does not seem to be harmful.

• Etanercept should normally be kept refrigerated. However, if needed, for example when travelling, it may be stored below 25°C for up to four weeks and then used or discarded.
• Keep all medicines out of reach of children.