This website has been developed and fully funded by Janssen and is intended only for UK patients who are prescribed TREMFYA® (guselkumab) is currently under maintenance.

If you have any queries in relation to your TREMFYA® medication, you can contact our Medical Information team on 01494 567447 or via email at

Reporting of Side Effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed on this website or in the Patient Information Leaflet. You can also report side effects directly via the Yellow Card Scheme at

By reporting side effects you can help provide more information on the safety of this medicine.

This medicine is subject to additional monitoring. This will allow quick identification of new safety information. You can help by reporting any side effects you may get. See for how to report side effects.


August 2020