IL-17 against IL-23 in plaque psoriasis — the two classes that now dominate treatment, differing in how fast they work and how often they are dosed.
COSENTYX is a human interleukin-17A antagonist indicated for the treatment of: moderate to severe plaque psoriasis (PsO) in adults and pediatric patients 6 years and older who are candidates for systemic therapy or phototherapy. ( 1.1 ) active psoriatic arthritis (PsA) in adults and pediatric patients 2 years of age and older. ( 1.2 ) active ankylosing spondylitis (AS) in adults and pediatric patients 12 years of age and older. ( 1.3 ) active non-radiographic axial spondyloarthritis (nr-axSpA) in adults with objective signs of inflammation. ( 1.4 ) active enthesitis-related arthritis (ERA) in pediatric patients 4 years of age and older. ( 1.5 ) moderate to severe hidradenitis suppurativa (HS) in adults and pediatric patients 12 years of age and older. ( 1.6 ) 1.1 Plaque Psoriasis COSENTYX ® is indicated for the treatment of moderate to severe plaque psoriasis (PsO) in adults and pediatr…
SKYRIZI is an interleukin-23 antagonist indicated for the treatment of: moderate-to-severe plaque psoriasis in adults and pediatric patients 6 years of age and older who are candidates for systemic therapy or phototherapy. ( 1.1 ) active psoriatic arthritis in adults and pediatric patients 6 years of age and older. ( 1.2 ) moderately to severely active Crohn's disease in adults. ( 1.3 ) moderately to severely active ulcerative colitis in adults. ( 1.4 ) 1.1 Plaque Psoriasis SKYRIZI ® is indicated for the treatment of moderate-to-severe plaque psoriasis in adults and pediatric patients 6 years of age and older who are candidates for systemic therapy or phototherapy. 1.2 Psoriatic Arthritis SKYRIZI is indicated for the treatment of active psoriatic arthritis in adults and pediatric patients 6 years of age and older. 1.3 Crohn’s Disease SKYRIZI is indicated for the treatment of moderately …
12.1 Mechanism of Action Secukinumab is a human IgG1 monoclonal antibody that selectively binds to the interleukin-17A (IL-17A) cytokine and inhibits its interaction with the IL-17 receptor. IL-17A is a naturally occurring cytokine that is involved in normal inflammatory and immune responses. Secukinumab inhibits the release of proinflammatory cytokines and chemokines.
12.1 Mechanism of Action Risankizumab-rzaa is a humanized IgG1 monoclonal antibody that selectively binds to the p19 subunit of human IL-23 cytokine and inhibits its interaction with the IL-23 receptor. IL-23 is a naturally occurring cytokine that is involved in inflammatory and immune responses. Risankizumab-rzaa inhibits the release of pro-inflammatory cytokines and chemokines.
Which medicine is right for a given person depends on their diagnosis, other conditions, other medicines, kidney and liver function, pregnancy, and cost or reimbursement — none of which this page knows. Two drugs in the same class are not automatically interchangeable. Never start, stop or switch a prescription medicine on the basis of a web page; that decision belongs to you and your clinician or pharmacist.
The facts on this page are pulled directly from official U.S. FDA datasets — they are not written from memory. Each field below names the dataset it came from, so you can check it yourself.
Plain-English summaries and drug-class explainers are written and reviewed by the Priya Life Science editorial team, led by Sreepriya Prasannan (MSc Digital Transformation of Life Sciences (Innopharma Education / Griffith College); MSc & BSc Botany). Data is retrieved automatically from the sources above and cross-checked with AI-assisted verification (Anthropic's Claude) — brand and generic names are matched against the exact FDA product record so that a combination product or a different formulation cannot be mistaken for the drug on this page. An editor reviews the result before publication. We describe this in full in our editorial standards and corrections policy. The FDA data on this page was last retrieved on 5 Aug 2026.