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Ixekizumab for the treatment of psoriasis: up-to-date

ABSTRACT Introduction: Ixekizumab (an IL-17A antagonist) is a biologic therapeutic licensed for use in moderate-to-severe plaque psoriasis and psoriatic arthritis. IL-17 antagonists (also including Secukinumab and Brodalumab) represent a new generation of biologic therapy with rapid and high response rates, quickly becoming a crucial part of the psoriasis treatment armamentarium. Areas covered: In this review, we describe how IL-17A antagonists disrupt inflammatory cascades in psoriasis and summarize results from clinical trials examining the safety and efficacy of ixekizumab against placebo and comparators. Expert opinion: Ixekizumab induces a 75% reduction in psoriasis area severity index (PASI 75) in 89% of patients after 12 weeks and after 1 year, PASI 75 is maintained in 80% of patients. Ixekizumab is superior to both etanercept and ustekinumab, however, further comparator trials are needed to determine superiority between newer agents. Network meta-analysis suggests that ixekizumab is one of the most rapid and efficacious agents for treating psoriasis, but ideally more long-term real-world data are needed to determine the persistence of response. Candida may be commonly encountered during treatment and IL-17 agents should be avoided in patients with inflammatory bowel disease. Overall, ixekizumab represents an efficacious and well-studied therapeutic that can offer biologic-naïve and bio-failure patients durable disease control.