This study will consist of a 4 week screening period, 12 week treatment period, and a 4 week follow up period for a total of 20 weeks. Each participant will be randomized to receive ESK-001 or placebo daily for 12 weeks. An open label extension study will be available for those patients who complete the study.
This is a multi-center, randomized, double-blind, placebo-controlled study in patients with moderate to severe plaque psoriasis.