New psoriasis drug tested as next step after older treatment

This study is observing patients with moderate-to-severe psoriasis who are switching from one injectable medication (ustekinumab) to another (guselkumab) as part of their regular doctor's care. Researchers will follow 200 patients for a year to see how well the new drug controls their skin symptoms and improves their quality of life, while also checking for any side effects. The goal is to gather real-world evidence on the safety and effectiveness of this specific medication switch.