Ustekinumab to guselkumab transitions: A series of 54 patients emulating the navigate trial in real life

NAVIGATE clinical trial demonstrated a higher rate of Psoriasis Assesment Severity Index (PASI)90 response in patients treated with guselkumab when compared to ustekinumab and an improved response in those who switched from ustekinumab to guselkumab due to partial response. The objective of the study is to describe ustekinumab to guselkumab switching in clinical practice. Observational, multicentric, descriptive study including 54 psoriasis patients who switched to guselkumab after treatment with ustekinumab from March 2019 to February 2021. Mean basal PASI with ustekinumab (16.7) was higher than with guselkumab (7.2). Up to 49.01% of patients were able to reach PASI90 with ustekinumab and up to 21.56% had a less frequent dosage regime vs. summary of product characteristics. Main reason to start guselkumab was a loss of ustekinumab cutaneous or articular response (82.36%) but up to 17.64% were switched in order to increase dosage regime efficiency. Six months after starting guselkumab, the absolute PASI was lower than 2 in 72% of patients and 38.5% of them were treated with a reduced dosage regime. Guselkumab doses used by our cohort were 19.5% lower than the expected according to the summary of product characteristics. No adverse events reported. There is no real‐world evidence regarding patients who switched from ustekinumab to guselkumab. A short paragraph in the article by Fougerousse et al, reported 63 patients with a mean basal PASI of 5.3 and similar efficacy rate at week 16 to NAVIGATE. Our study adds practical information regarding efficacy, safety and efficiency through dose optimization in a real‐world cohort.