Get emergency medical help if you have signs of an allergic reaction to Tremfya: hives, rash, itching; chest tightness, difficult breathing; feeling light-headed; swelling of your face, lips, tongue, or throat.
Guselkumab can weaken (suppress) your immune system, and you may get an infection more easily.
Call your doctor at once if you have signs of infection, such as:
fever, chills, body aches, night sweats;
weight loss, feeling very tired;
cough (may contain blood or mucus), shortness of breath;
pain or burning when you urinate;
severe diarrhea or stomach cramps; or
skin redness, tingling, blisters, oozing, or sores that look different from psoriasis.
Common Tremfya side effects may include:
headache, joint pain;
diarrhea, stomach pain;
cold symptoms such as stuffy nose, sneezing, sore throat;
cough, feeling short of breath;
skin infections; or
pain, itching, swelling, redness, or bruising where the medicine was injected.
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.
 Tremfya side effects (more detail)
