Tremfya Side Effects
Common and serious side effects of Tremfya (guselkumab), what to watch for, and when to call your doctor.
Common side effects
This is not a complete list. Always consult a doctor or pharmacist.
- Respiratory infections
- Headache
- Injection site reactions
- Joint pain
- Diarrhea
Serious warnings
Tremfya has notable warnings and precautions. Tell your doctor about your medical history and any other medicines or supplements you take before starting Tremfya.
When to call a doctor
As a general rule with any prescription medicine, contact your doctor about any side effect that is severe, persistent, or worries you. General guidance is to seek emergency care for signs of a serious allergic reaction to any medicine — such as trouble breathing or swelling of the face, lips, tongue, or throat.
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Frequently asked questions
What are the most common side effects of Tremfya?
Commonly reported side effects of Tremfya (guselkumab) include Respiratory infections, Headache, Injection site reactions, Joint pain, and Diarrhea. This is not a complete list — tell your doctor or pharmacist about any side effects you experience.
Does Tremfya have any serious or boxed warnings?
Tremfya has notable warnings and precautions. Tell your doctor about your medical history and any other medicines or supplements you take before starting Tremfya.
When should I call my doctor about Tremfya side effects?
As a general rule with any prescription medicine, call your doctor about any side effect that is severe, doesn't go away, or worries you. General guidance is to seek emergency care for signs of a serious allergic reaction to any medicine — such as trouble breathing or swelling of the face, lips, tongue, or throat. For advice about your situation, talk to a licensed healthcare provider.
Where can I find the full list of Tremfya side effects?
The side effects above are commonly reported ones recorded for Tremfya (guselkumab); they are not a complete list. For the full prescribing information and medication guide, check the official Tremfya label or ask your doctor or pharmacist.
Should I stop taking Tremfya if I have side effects?
General medical guidance is not to stop a prescription medicine on your own without talking to your doctor first. Your doctor can advise whether to continue, adjust, or change your treatment. This page is informational and not medical advice.