Long-term safety and effectiveness of psoriasis treatments in real life

This is a long-term tracking study for people with moderate to severe psoriasis or psoriatic arthritis who are starting a new systemic treatment for the first time. Researchers want to understand how well different medications—including biologics like adalimumab, etanercept, infliximab, and ustekinumab, as well as older systemic drugs like methotrexate and cyclosporine—work over 5 years in real-world conditions, not just in controlled clinical trials.

While we know these medications work well in short-term studies, doctors need more information about how they perform over many years, how patients feel on them long-term, and which treatments work best for different people. This registry fills that gap by collecting real-world data from Swiss patients to guide treatment decisions.