This website has been developed and fully funded by Janssen-Cilag Ltd. and is intended for UK patients prescribed Tremfya®▼ (guselkumab) only.

Information on COVID-19 for patients using Tremfya® (guselkumab)

Contact us

If you have any questions, comments, or concerns about this privacy policy or the information practices of this site, please contact us as follows:

By post: Janssen-Cilag Ltd, 50–100 Holmers Farm Way, High Wycombe, Buckinghamshire, HP12 4EG.

If you have any questions about your condition, please speak to your doctor or specialist.

Alternatively you could contact NHS Advice Service on 111.

Reporting of side effects

Reporting an Adverse Event will help Janssen monitor the safety of all our healthcare products to ensure they are acceptably safe for patients and those who use them. Reporting adverse events allows Janssen to provide up to date information on our products in the product information leaflets and SmPCs and to help minimise risk and maximise benefit to the patients and consumers.

It is important to report adverse events even if it is a known adverse event as this still provides valuable information for monitoring product safety. Please contact the Drug Safety Team on:

Adverse Event Reporting

Tel: 01494 567 447

E-Mail: dsafety@its.jnj.com

Adverse events can also be reported directly the Medicines and Healthcare products Regulatory Agency. Reporting forms and information can be found at www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.

Reporting side effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in the package leaflet. You can also report side effects directly via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.

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 www.mhra.gov.uk/yellowcard for how to report side effects.