cannot have guttate, pustular, erythrodermic or other non-plaque forms of psoriasis

cannot have concomitant serious illness/condition that may interfere with participation in the study

cannot have used topical therapy within 2 weeks prior to baseline visit

cannot have used photo-therapy or systemic psoriasis therapy within 4 weeks prior to baseline visit

cannot have had prolonged exposure to natural or artificial UV radiation within 4 weeks of baseline visit or intend to have exposure during the study

cannot have used systemic immunomodulatory therapy within 12 weeks prior to baseline visit

cannot have a history of hypercalcemia or kidney stones

cannot be unable or unwilling to discontinue calcium and/or vitamin D supplementation during the study

cannot be pregnant or a nursing mother

cannot be participating in or have participated in an interventional study within 30 days of study start

Safety and Efficacy of Topically Applied CTA018 in Plaque Psoriasis