Because etanercept works by blocking the immune system, it may lower your ability to fight infections. This may make you more likely to get a serious (rarely fatal) infection (such as fungal infections, bacterial infections including tuberculosis) or make any infection you have worse. Tell your doctor your medical history, especially of past/recent/current infections. Also, tell your doctor if you have lived or traveled in areas where certain fungal infections (such as coccidioidomycosis, histoplasmosis) are common or if you have been near someone with tuberculosis. Areas where these types of fungal infections are commonly found include the Ohio and Mississippi River valleys and the southwestern United States. You should be tested for tuberculosis (TB skin test or chest X-ray) before and during treatment with etanercept. Tell your doctor right away if you have any signs of infection (such as sore throat or cough that doesn't go away, fever, chills, night sweats, painful/frequent urination, unusual vaginal discharge, white patches in the mouth).
The immune system is also important in preventing and controlling cancer. Though it is very unlikely to happen, there is a risk (especially in children/teens/young adults) of developing cancer (such as lymphoma, skin) due to this medication or due to your medical condition. Discuss the risks and benefits of treatment with your doctor. Tell your doctor right away if you develop symptoms such as fever that doesn't go away, unusual lumps/growths, swollen or painful abdomen, unexplained weight loss, or night sweats.
Before using etanercept, tell your doctor or pharmacist if you are allergic to it; or to latex or natural dry rubber (found in some forms of etanercept); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: active or recurrent infection (such as hepatitis B, HIV, tuberculosis), blood disorders (such as leukemia, anemia), weakened bone marrow, history of cancer (such as lymphoma), diabetes, heart failure, seizures, nervous system problems (such as multiple sclerosis), a certain liver problem (alcoholic hepatitis), blood vessel disorders (such as vasculitis).
Etanercept can make you more likely to get infections or may make current infections worse. Stay away from anyone who has an infection that may easily spread (such as chickenpox, COVID-19, measles, flu). Talk to your doctor if you have been exposed to an infection or for more details.
Tell your health care professional that you are using etanercept before having any immunizations/vaccinations. Avoid contact with people who have recently received live vaccines (such as flu vaccine inhaled through the nose).
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be at greater risk for infections while using this drug.
It is recommended that children be up to date on all their childhood vaccinations before starting etanercept.
During pregnancy, this medication should be used only when clearly needed. It may harm an unborn baby. Discuss the risks and benefits with your doctor. Mothers who have used this medication during pregnancy should ask a doctor about immunizations/vaccinations for their newborn babies.
This medication passes into breast milk. Consult your doctor before breastfeeding.
See also Warning section.
Redness, itching, pain, or swelling at the injection site may occur. This usually starts 1-2 days after the injection and clears up in 3-5 days. Injection site reactions usually lessen after the first month. Headache may also occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: signs of liver disease (such as nausea/vomiting that doesn't stop, dark urine, stomach/abdominal pain, yellowing eyes/skin), a rash on nose and cheeks (butterfly rash), dizziness, extreme tiredness, looking pale, hair loss, swelling of the arms/legs, unusual bruising/bleeding, severe headache, mental/mood changes, seizures, unexplained muscle weakness, numbness/tingling of the hands/feet, unsteadiness, vision changes.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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