Get emergency medical help if you have signs of an allergic reaction to Enbrel: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Serious and sometimes fatal infections may occur. Call your doctor right away if you have signs of infection such as: fever, chills, cough, sweating, body aches, skin sores or redness, diarrhea, weight loss, burning when you urinate, coughing up blood, or feeling very tired or short of breath.
Also call your doctor at once if you have:
fever, chills, flu symptoms;
pale skin, easy bruising or bleeding;
pain, redness, or swelling where etanercept was injected (for longer than 5 days after injection);
signs of lymphoma - fever, night sweats, weight loss, stomach pain or swelling, swollen glands (in your neck, armpits, or groin);
signs of tuberculosis - cough, night sweats, loss of appetite, weight loss, feeling very tired;
new or worsening psoriasis - skin redness or scaly patches, raised bumps filled with pus;
nerve problems - dizziness, numbness or tingling, problems with vision, or weak feeling in your arms or legs;
signs of heart failure - shortness of breath, swelling in your lower legs;
lupus-like syndrome - joint pain or swelling, chest discomfort, feeling short of breath, skin rash on your cheeks or arms (worsens in sunlight); or
liver problems - right-sided upper stomach pain, vomiting, tiredness, loss of appetite, yellowing of your skin or eyes.
Common Enbrel side effects may include:
pain, swelling, itching, or redness where the medicine was injected;
headache; or
cold symptoms such as stuffy nose, sneezing, sore throat.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Enbrel side effects (more detail)
