See also Warning section.
Cough, sore throat, stuffy/runny nose, burning/painful/frequent urination, or joint pain may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she 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 develop signs of infection while using this drug, such as: fever, chills, persistent sore throat, persistent cough, night sweats, trouble breathing, painful/frequent urination, unusual vaginal discharge, white patches in the mouth (oral thrush).
Tell your doctor right away if you have any serious side effects, including: easy bruising/bleeding, swollen joints, rash on nose and cheeks, eye pain, vision changes, dizziness, numbness/tingling of arms/legs, seizures, new or worsening symptoms of heart failure (such as shortness of breath, swelling ankles/feet, unusual tiredness, unusual/sudden weight gain).
Certolizumab may rarely cause serious (possibly fatal) liver disease in people exposed to hepatitis B virus. Your doctor may order blood tests and watch for symptoms during treatment and for several months after your last treatment. Get medical help right away if you have any symptoms of liver damage, including: persistent nausea/vomiting, stomach/abdominal pain, dark urine, yellowing eyes/skin.
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), severe 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.