What side effects can Remicade (infliximab) cause?
Remicade symptoms people report are usually side effects—some mild, some urgent. Common issues include infusion-related reactions such as headache, dizziness, chills, fever, flushing, itching or rash, shortness of breath, or chest discomfort. People can also develop infections (because infliximab lowers parts of the immune response), which may cause fever, sore throat, cough, burning when urinating, or new or worsening fatigue.
Urgent symptoms to seek care for include severe allergic reactions (swelling of face/lips/tongue, widespread hives, trouble breathing), serious infections (high fever, confusion, severe weakness), and signs of liver problems (yellow skin/eyes, dark urine, severe nausea/vomiting, right-sided abdominal pain).
How soon after a Remicade infusion do symptoms show up?
Some symptoms appear during or shortly after the infusion because Remicade is given through an IV. Infusion reactions often occur while the infusion is running or within the hours after. Other effects, including infections, can show up days to weeks later depending on what organism causes the illness and how the body responds.
What are the “infection” symptoms patients watch for on Remicade?
Common infection symptoms include:
- Fever or chills
- Sore throat, persistent cough, or shortness of breath
- Pain or burning with urination
- Skin redness, swelling, or drainage
- Unexplained worsening fatigue or body aches
Because Remicade can blunt immune responses, some infections may feel less dramatic than usual, so any new or worsening symptoms should be treated seriously.
What causes Remicade-related reactions?
Remicade can trigger reactions in a few ways:
- Infusion-related immune reactions to the drug delivery during IV administration
- Allergic reactions (including rare severe reactions)
- Reactivation or new infection risk due to immune suppression
Doctors may use premedication and slower infusion rates to reduce infusion reaction risk in some patients.
When should symptoms be treated as an emergency?
Get urgent medical help if symptoms include:
- Trouble breathing, wheezing, or swelling of the face/lips/tongue
- Chest pain, fainting, or severe dizziness
- High fever with severe weakness, confusion, or rapidly worsening condition
- Yellowing of skin/eyes or dark urine suggesting liver injury
If symptoms are mild but new (for example, rash or mild fever), contact the prescribing clinician promptly for guidance.
Who is at higher risk for Remicade complications?
Risk is higher for people who already have active infections, a history of recurrent infections, or certain medical conditions. Clinicians typically screen for tuberculosis and hepatitis before starting treatment because infliximab can allow these infections to reactivate.
What alternatives exist if Remicade symptoms are too hard to tolerate?
If symptoms are driven by infusion reactions or recurrent infections, the prescribing clinician may adjust the regimen (dose schedule, infusion rate, or premedications) or switch to another therapy in the same treatment area. The exact alternative depends on the condition being treated and the specific side effects.
If you tell me what symptoms you mean (for example, fever, rash, stomach pain, shortness of breath, timing after the infusion, and your condition like Crohn's or rheumatoid arthritis), I can help narrow down which Remicade-related causes fit best and what to do next.