Guselkumab (Tremfya)

Tremfya (Guselkumab) is a biologic medicine that suppresses the immune system in order to treat psoriatic arthritis and psoriasis.

Tremfya works by blocking a signalling protein (cytokine) named interleukin-23 (IL-23). These cytokines regulate the body’s immune system and are related to its inflammatory response.

Taking Tremfya

Tremfya is available as a pre-filled syringe that can be administered at home.

Although some patients who take Tremfya can feel better quite quickly, in others it can take a little longer. It is important to keep taking this medicine as prescribed by a doctor.

The manufacturer of Tremfya offers a support program to Canadian patients that are prescribed the medication:

Patient support program enrolment forms

Important Tests and Risks




Tremfya Quick Reference Guide

Drug Identification Number (DIN)

  • 02469758
  • 02487314